# CVE-2024-7885: Undertow: improper state management in proxy protocol parsing causes information leakage

Status: published. Published: 2024-08-21. Updated: 2026-11-03.

A vulnerability was found in Undertow where the ProxyProtocolReadListener reuses the same StringBuilder instance across multiple requests. This issue occurs when the parseProxyProtocolV1 method processes multiple requests on the same HTTP connection. As a result, different requests may share the same StringBuilder instance, potentially leading to information leakage between requests or responses. In some cases, a value from a previous request or response may be erroneously reused, which could lead to unintended data exposure. This issue primarily results in errors and connection termination but creates a risk of data leakage in multi-request environments.

## Remediation

No remediation reported in collected sources

## Affected products and versions

-  /  (undertow): ≥ 0; < 2.2.36.Final (affected, custom); ≥ 2.3.0.Alpha1; < 2.3.17.Final (affected, custom). Source: CNA: redhat
- Red Hat / HawtIO 4.0.0 for Red Hat build of Apache Camel 4 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel 3.20.7 for Spring Boot (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel 4.4.2 for Spring Boot (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform (io.undertow/undertow-core): ≥ 2.2.33.SP2-redhat-00001; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7: Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-apache-commons-beanutils): ≥ 0:1.11.0-1.redhat_00001.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-hornetq): ≥ 0:2.4.11-1.Final_redhat_00001.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jboss-server-migration): ≥ 0:1.7.2-19.Final_redhat_00020.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-undertow): ≥ 0:2.0.41-5.SP6_redhat_00001.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-wildfly): ≥ 0:7.3.15-5.GA_redhat_00003.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-annotations): ≥ 0:2.10.4-4.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-core): ≥ 0:2.10.4-4.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-databind): ≥ 0:2.10.4-6.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-jaxrs-providers): ≥ 0:2.10.4-4.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-modules-base): ≥ 0:2.10.4-6.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jackson-modules-java8): ≥ 0:2.10.4-3.redhat_00008.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-jboss-server-migration): ≥ 0:1.7.2-20.Final_redhat_00021.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-netty): ≥ 0:4.1.63-6.Final_redhat_00004.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-undertow): ≥ 0:2.0.41-6.SP7_redhat_00001.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 (eap7-wildfly): ≥ 0:7.3.16-3.GA_redhat_00003.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 (eap7-undertow): ≥ 0:2.2.33-2.SP2_redhat_00001.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 (eap7-wildfly): ≥ 0:7.4.18-1.GA_redhat_00003.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 (eap7-undertow): ≥ 0:2.2.33-2.SP2_redhat_00001.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 (eap7-wildfly): ≥ 0:7.4.18-1.GA_redhat_00003.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 (eap7-undertow): ≥ 0:2.2.33-2.SP2_redhat_00001.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 (eap7-wildfly): ≥ 0:7.4.18-1.GA_redhat_00003.1.el7eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8 (undertow-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 (eap8-amazon-ion-java): ≥ 0:1.11.9-2.redhat_00001.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 (eap8-eap-product-conf-parent): ≥ 0:800.3.1-2.GA_redhat_00002.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 (eap8-undertow): ≥ 0:2.3.14-2.SP2_redhat_00001.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 (eap8-wildfly): ≥ 0:8.0.3-13.GA_redhat_00007.1.el8eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 (eap8-amazon-ion-java): ≥ 0:1.11.9-2.redhat_00001.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 (eap8-eap-product-conf-parent): ≥ 0:800.3.1-2.GA_redhat_00002.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 (eap8-undertow): ≥ 0:2.3.14-2.SP2_redhat_00001.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 (eap8-wildfly): ≥ 0:8.0.3-13.GA_redhat_00007.1.el9eap; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel for Spring Boot 3 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel - HawtIO 4 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Build of Keycloak (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus (quarkus-undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Data Grid 8 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Fuse 7 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Integration Camel K 1 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Data Grid 7 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (undertow-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack (undertow-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Process Automation 7 (undertow): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7 (undertow): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 2.64% as of 2026-11-02; percentile 85.60%

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

- Weaknesses: CWE-362

## Exploit evidence

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

## References

- https://access.redhat.com/errata/RHSA-2024:11023 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:6508 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:6883 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:7441 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:7442 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:7735 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:7736 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:8080 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:16667 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:0743 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-7885 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2305290 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://security.netapp.com/advisory/ntap-20241011-0004/ (ADP: CVE)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-7885; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-7885; retrieved 2026-11-03; source updated Not reported

Revision: eca4d5c932d3a9dadd73c66e8f97aa1e105cb7c2269fbfae80535141bfca5747

Canonical: https://y2.dev/cve/CVE-2024-7885

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