# CVE-2020-8908: Temp directory permission issue in Guava

Status: published. Published: 2020-12-10. Updated: 2026-11-02.

A temp directory creation vulnerability exists in all versions of Guava, allowing an attacker with access to the machine to potentially access data in a temporary directory created by the Guava API com.google.common.io.Files.createTempDir(). By default, on unix-like systems, the created directory is world-readable (readable by an attacker with access to the system). The method in question has been marked @Deprecated in versions 30.0 and later and should not be used. For Android developers, we recommend choosing a temporary directory API provided by Android, such as context.getCacheDir(). For other Java developers, we recommend migrating to the Java 7 API java.nio.file.Files.createTempDirectory() which explicitly configures permissions of 700, or configuring the Java runtime's java.io.tmpdir system property to point to a location whose permissions are appropriately configured.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Google LLC / Guava: ≥ 1.0; < 32.0 (affected, custom). Source: CNA: Google

## Severity and prioritization

- CVSS 3.1: 3.3 (low); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: CNA: Google

- CISA KEV: No listing in collected sources

- EPSS: 0.92% as of 2026-11-02; percentile 60.41%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-378

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/google/guava/issues/4011 (CNA: Google; x_refsource_CONFIRM)

- https://github.com/google/guava/commit/fec0dbc4634006a6162cfd4d0d09c962073ddf40 (CNA: Google; x_refsource_CONFIRM)

- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEGUAVA-1015415 (CNA: Google; x_refsource_MISC)

- https://lists.apache.org/thread.html/r68d86f4b06c808204f62bcb254fcb5b0432528ee8d37a07ef4bc8222%40%3Ccommits.ws.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r215b3d50f56faeb2f9383505f3e62faa9f549bb23e8a9848b78a968e%40%3Ccommits.ws.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rb8c0f1b7589864396690fe42a91a71dea9412e86eec66dc85bbacaaf%40%3Ccommits.cxf.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r4776f62dfae4a0006658542f43034a7fc199350e35a66d4e18164ee6%40%3Ccommits.cxf.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rbc7642b9800249553f13457e46b813bea1aec99d2bc9106510e00ff3%40%3Ctorque-dev.db.apache.org%3E (CNA: Google; x_refsource_MISC)

- https://lists.apache.org/thread.html/r841c5e14e1b55281523ebcde661ece00b38a0569e00ef5e12bd5f6ba%40%3Cissues.maven.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rc2dbc4633a6eea1fcbce6831876cfa17b73759a98c65326d1896cb1a%40%3Ctorque-dev.db.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rd5d58088812cf8e677d99b07f73c654014c524c94e7fedbdee047604%40%3Ctorque-dev.db.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r3c3b33ee5bef0c67391d27a97cbfd89d44f328cf072b601b58d4e748%40%3Ccommits.pulsar.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rfc27e2727a20a574f39273e0432aa97486a332f9b3068f6ac1346594%40%3Cdev.myfaces.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rd01f5ff0164c468ec7abc96ff7646cea3cce6378da2e4aa29c6bcb95%40%3Cgithub.arrow.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://www.oracle.com/security-alerts/cpuApr2021.html (CNA: Google; x_refsource_MISC)

- https://lists.apache.org/thread.html/r2fe45d96eea8434b91592ca08109118f6308d60f6d0e21d52438cfb4%40%3Cdev.drill.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r07ed3e4417ad043a27bee7bb33322e9bfc7d7e6d1719b8e3dfd95c14%40%3Cdev.drill.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r6874dfe26eefc41b7c9a5e4a0487846fc4accf8c78ff948b24a1104a%40%3Cdev.drill.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r161b87f8037bbaff400194a63cd2016c9a69f5949f06dcc79beeab54%40%3Cdev.drill.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://www.oracle.com//security-alerts/cpujul2021.html (CNA: Google; x_refsource_MISC)

- https://lists.apache.org/thread.html/ra7ab308481ee729f998691e8e3e02e93b1dedfc98f6b1cd3d86923b3%40%3Cyarn-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rf00b688ffa620c990597f829ff85fdbba8bf73ee7bfb34783e1f0d4e%40%3Cyarn-dev.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r58a8775205ab1839dba43054b09a9ab3b25b423a4170b2413c4067ac%40%3Ccommon-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/re120f6b3d2f8222121080342c5801fdafca2f5188ceeb3b49c8a1d27%40%3Cyarn-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r49549a8322f62cd3acfa4490d25bfba0be04f3f9ff4d14fe36199d27%40%3Cyarn-dev.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rcafc3a637d82bdc9a24036b2ddcad1e519dd0e6f848fcc3d606fd78f%40%3Cdev.hive.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r007add131977f4f576c232b25e024249a3d16f66aad14a4b52819d21%40%3Ccommon-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/reebbd63c25bc1a946caa419cec2be78079f8449d1af48e52d47c9e85%40%3Cissues.geode.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r79e47ed555bdb1180e528420a7a2bb898541367a29a3bc6bbf0baf2c%40%3Cissues.hive.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rd2704306ec729ccac726e50339b8a8f079515cc29ccb77713b16e7c5%40%3Cissues.hive.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r5d61b98ceb7bba939a651de5900dbd67be3817db6bfcc41c6e04e199%40%3Cyarn-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r7b0e81d8367264d6cad98766a469d64d11248eb654417809bfdacf09%40%3Cyarn-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rb2364f4cf4d274eab5a7ecfaf64bf575cedf8b0173551997c749d322%40%3Cgitbox.hive.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r294be9d31c0312d2c0837087204b5d4bf49d0552890e6eec716fa6a6%40%3Cyarn-issues.hadoop.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rf9f0fa84b8ae1a285f0210bafec6de2a9eba083007d04640b82aa625%40%3Cissues.geode.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r5b3d93dfdfb7708e796e8762ab40edbde8ff8add48aba53e5ea26f44%40%3Cissues.geode.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/r3dd8881de891598d622227e9840dd7c2ef1d08abbb49e9690c7ae1bc%40%3Cissues.geode.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://lists.apache.org/thread.html/rc607bc52f3507b8b9c28c6a747c3122f51ac24afe80af2a670785b97%40%3Cissues.geode.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://www.oracle.com/security-alerts/cpuoct2021.html (CNA: Google; x_refsource_MISC)

- https://lists.apache.org/thread.html/rd7e12d56d49d73e2b8549694974b07561b79b05455f7f781954231bf%40%3Cdev.pig.apache.org%3E (CNA: Google; mailing-list, x_refsource_MLIST)

- https://www.oracle.com/security-alerts/cpujan2022.html (CNA: Google; x_refsource_MISC)

- https://www.oracle.com/security-alerts/cpuapr2022.html (CNA: Google; x_refsource_MISC)

- https://security.netapp.com/advisory/ntap-20220210-0003/ (CNA: Google; x_refsource_CONFIRM)

- https://github.com/google/guava/issues/4011 (ADP: CVE; x_refsource_CONFIRM, x_transferred)

- https://github.com/google/guava/commit/fec0dbc4634006a6162cfd4d0d09c962073ddf40 (ADP: CVE; x_refsource_CONFIRM, x_transferred)

- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEGUAVA-1015415 (ADP: CVE; x_refsource_MISC, x_transferred)

- https://lists.apache.org/thread.html/r68d86f4b06c808204f62bcb254fcb5b0432528ee8d37a07ef4bc8222%40%3Ccommits.ws.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r215b3d50f56faeb2f9383505f3e62faa9f549bb23e8a9848b78a968e%40%3Ccommits.ws.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rb8c0f1b7589864396690fe42a91a71dea9412e86eec66dc85bbacaaf%40%3Ccommits.cxf.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r4776f62dfae4a0006658542f43034a7fc199350e35a66d4e18164ee6%40%3Ccommits.cxf.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rbc7642b9800249553f13457e46b813bea1aec99d2bc9106510e00ff3%40%3Ctorque-dev.db.apache.org%3E (ADP: CVE; x_refsource_MISC, x_transferred)

- https://lists.apache.org/thread.html/r841c5e14e1b55281523ebcde661ece00b38a0569e00ef5e12bd5f6ba%40%3Cissues.maven.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rc2dbc4633a6eea1fcbce6831876cfa17b73759a98c65326d1896cb1a%40%3Ctorque-dev.db.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rd5d58088812cf8e677d99b07f73c654014c524c94e7fedbdee047604%40%3Ctorque-dev.db.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r3c3b33ee5bef0c67391d27a97cbfd89d44f328cf072b601b58d4e748%40%3Ccommits.pulsar.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rfc27e2727a20a574f39273e0432aa97486a332f9b3068f6ac1346594%40%3Cdev.myfaces.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rd01f5ff0164c468ec7abc96ff7646cea3cce6378da2e4aa29c6bcb95%40%3Cgithub.arrow.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://www.oracle.com/security-alerts/cpuApr2021.html (ADP: CVE; x_refsource_MISC, x_transferred)

- https://lists.apache.org/thread.html/r2fe45d96eea8434b91592ca08109118f6308d60f6d0e21d52438cfb4%40%3Cdev.drill.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r07ed3e4417ad043a27bee7bb33322e9bfc7d7e6d1719b8e3dfd95c14%40%3Cdev.drill.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r6874dfe26eefc41b7c9a5e4a0487846fc4accf8c78ff948b24a1104a%40%3Cdev.drill.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r161b87f8037bbaff400194a63cd2016c9a69f5949f06dcc79beeab54%40%3Cdev.drill.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://www.oracle.com//security-alerts/cpujul2021.html (ADP: CVE; x_refsource_MISC, x_transferred)

- https://lists.apache.org/thread.html/ra7ab308481ee729f998691e8e3e02e93b1dedfc98f6b1cd3d86923b3%40%3Cyarn-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rf00b688ffa620c990597f829ff85fdbba8bf73ee7bfb34783e1f0d4e%40%3Cyarn-dev.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r58a8775205ab1839dba43054b09a9ab3b25b423a4170b2413c4067ac%40%3Ccommon-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/re120f6b3d2f8222121080342c5801fdafca2f5188ceeb3b49c8a1d27%40%3Cyarn-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r49549a8322f62cd3acfa4490d25bfba0be04f3f9ff4d14fe36199d27%40%3Cyarn-dev.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rcafc3a637d82bdc9a24036b2ddcad1e519dd0e6f848fcc3d606fd78f%40%3Cdev.hive.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r007add131977f4f576c232b25e024249a3d16f66aad14a4b52819d21%40%3Ccommon-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/reebbd63c25bc1a946caa419cec2be78079f8449d1af48e52d47c9e85%40%3Cissues.geode.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r79e47ed555bdb1180e528420a7a2bb898541367a29a3bc6bbf0baf2c%40%3Cissues.hive.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rd2704306ec729ccac726e50339b8a8f079515cc29ccb77713b16e7c5%40%3Cissues.hive.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r5d61b98ceb7bba939a651de5900dbd67be3817db6bfcc41c6e04e199%40%3Cyarn-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r7b0e81d8367264d6cad98766a469d64d11248eb654417809bfdacf09%40%3Cyarn-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rb2364f4cf4d274eab5a7ecfaf64bf575cedf8b0173551997c749d322%40%3Cgitbox.hive.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r294be9d31c0312d2c0837087204b5d4bf49d0552890e6eec716fa6a6%40%3Cyarn-issues.hadoop.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rf9f0fa84b8ae1a285f0210bafec6de2a9eba083007d04640b82aa625%40%3Cissues.geode.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r5b3d93dfdfb7708e796e8762ab40edbde8ff8add48aba53e5ea26f44%40%3Cissues.geode.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/r3dd8881de891598d622227e9840dd7c2ef1d08abbb49e9690c7ae1bc%40%3Cissues.geode.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://lists.apache.org/thread.html/rc607bc52f3507b8b9c28c6a747c3122f51ac24afe80af2a670785b97%40%3Cissues.geode.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://www.oracle.com/security-alerts/cpuoct2021.html (ADP: CVE; x_refsource_MISC, x_transferred)

- https://lists.apache.org/thread.html/rd7e12d56d49d73e2b8549694974b07561b79b05455f7f781954231bf%40%3Cdev.pig.apache.org%3E (ADP: CVE; mailing-list, x_refsource_MLIST, x_transferred)

- https://www.oracle.com/security-alerts/cpujan2022.html (ADP: CVE; x_refsource_MISC, x_transferred)

- https://www.oracle.com/security-alerts/cpuapr2022.html (ADP: CVE; x_refsource_MISC, x_transferred)

- https://security.netapp.com/advisory/ntap-20220210-0003/ (ADP: CVE; x_refsource_CONFIRM, x_transferred)

## Provenance

- CNA: Google: https://www.cve.org/CVERecord?id=CVE-2020-8908; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2020-8908; retrieved 2026-11-02; source updated Not reported

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