# CVE-2026-84161: Authenticated remote denial of service through unbounded zlib decompression in storeAnalysisStatistics

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

When an operator enables store.analysis_statistics_dir, a network client with PRODUCT_STORE permission for a product can call that product's storeAnalysisStatistics Thrift-over-HTTP method. CodeChecker 6.29.0 decodes the attacker-controlled Base64 string and passes the complete compressed input to one-shot zlib.decompress(). No maximum decompressed size is enforced.



This gives a correctly authorized, non-superuser store account a high-ratio memory and persistent-disk amplification primitive. The complete output is first materialized as a Python bytes object and is then written to the configured statistics directory. A sufficiently scaled payload can exhaust the API worker or host memory and impair CodeChecker availability.



The shipped value of store.analysis_statistics_dir is null, so the affected feature is disabled by default. The primary assessment does not rely on authentication being disabled. There is no authorization bypass and no path traversal in this report.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Ericsson / CodeChecker: ≥ 0; < 6.29.3 (affected, semver); unaffected at 6.29.3. Source: CNA: ERIC

## Severity and prioritization

- CVSS 3.1: 4.9 (medium); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H; source: CNA: ERIC

- CVSS 3.1: 4.9 (medium); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H; source: NVD: 85b1779b-6ecd-4f52-bcc5-73eac4659dcf

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-409, CWE-770

## Exploit evidence

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

## References

- https://github.com/Ericsson/codechecker/security/advisories/GHSA-w57m-6g36-jjwv (CNA: ERIC)

- https://github.com/Ericsson/codechecker/security/advisories/GHSA-w57m-6g36-jjwv (85b1779b-6ecd-4f52-bcc5-73eac4659dcf)

## Provenance

- CNA: ERIC: https://www.cve.org/CVERecord?id=CVE-2026-84161; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-84161; retrieved 2026-11-06; source updated 2026-11-06

Revision: 78ea87eebd81aa089feeefdc4278c1fd3310b631951230039c60a70d222def8d

Canonical: https://y2.dev/cve/CVE-2026-84161

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Collected public records only. Check source status for coverage and freshness.