How severe is CVE-2025-55668?

CVE-2025-55668 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2025-55668?

CVE-2025-55668 affects the following packages: org.apache.tomcat:tomcat-catalina (Maven), org.apache.tomcat:tomcat-catalina (Maven), org.apache.tomcat:tomcat-catalina (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2025-55668?

Update org.apache.tomcat:tomcat-catalina to 11.0.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-55668 is resolved across your whole dependency graph.

How do I detect CVE-2025-55668 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.tomcat:tomcat-catalina, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-55668 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2025-55668 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-55668 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-55668?

CVE-2025-55668 has an EPSS (Exploit Prediction Scoring System) score of 0.9%, placing it in the 61th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-55668?

CVE-2025-55668 is classified as CWE-384 (CWE-384). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-55668 published, and has it been updated?

CVE-2025-55668 was published on August 13, 2025 and was last updated on October 29, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2025-55668 — tomcat-catalina

MEDIUMFix: apache/tomcat@8621e4c

CVE-2025-55668 is a medium-severity (CVSS 6.5) CWE-384 vulnerability in org.apache.tomcat:tomcat-catalina. A fix is available for org.apache.tomcat:tomcat-catalina — see the affected versions and patch details below.

Apache Tomcat: session fixation via rewrite valve

Also known asBIT-tomcat-2025-55668GHSA-23hv-mwm6-g8jf

Published

Aug 13, 2025

Updated

Oct 29, 2026

Affected

6 pkgs

Patched

6 / 6

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-55668.

EPSS Exploitation Probability

via FIRST.org ↗

0.9%probability of exploitation in next 30 days

Lower Risk+0.07%

Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

6 pkgs affected

☕org.apache.tomcat:tomcat-catalina☕org.apache.tomcat:tomcat-catalina☕org.apache.tomcat:tomcat-catalina☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Session Fixation vulnerability in Apache Tomcat via rewrite valve.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Affected Packages

6 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.tomcat:tomcat-catalina`	≥ 11.0.0-M1&&< 11.0.8	11.0.8`org.apache.tomcat:tomcat-catalina:11.0.8`
☕Maven	`org.apache.tomcat:tomcat-catalina`	≥ 10.1.0-M1&&< 10.1.42	10.1.42`org.apache.tomcat:tomcat-catalina:10.1.42`
☕Maven	`org.apache.tomcat:tomcat-catalina`	≥ 9.0.0.M1&&< 9.0.106	9.0.106`org.apache.tomcat:tomcat-catalina:9.0.106`
☕Maven	`org.apache.tomcat.embed:tomcat-embed-core`	≥ 11.0.0-M1&&< 11.0.8	11.0.8`org.apache.tomcat.embed:tomcat-embed-core:11.0.8`
☕Maven	`org.apache.tomcat.embed:tomcat-embed-core`	≥ 10.1.0-M1&&< 10.1.42	10.1.42`org.apache.tomcat.embed:tomcat-embed-core:10.1.42`
☕Maven	`org.apache.tomcat.embed:tomcat-embed-core`	≥ 9.0.0.M1&&< 9.0.106	9.0.106`org.apache.tomcat.embed:tomcat-embed-core:9.0.106`

Affected Products

1 product · 30 configurations

Application

tomcatapache

≥ 11.0.0 && < 11.0.8

1 version

9.0.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.tomcat:tomcat-catalina, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.tomcat:tomcat-catalina to 11.0.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-55668 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: Red Hat security advisory for CVE-2025-55668 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat Enterprise Linux 10	`tomcat9-1:9.0.110-2.el10_2`	RHSA-2026:18536
Red Hat Enterprise Linux 10	`tomcat-1:10.1.49-1.el10`	RHSA-2026:18537
Red Hat Enterprise Linux 10.0 Extended Update Support	`tomcat9-1:9.0.120-1.el10_0`	RHSA-2026:67163
Red Hat Enterprise Linux 8	`tomcat-1:9.0.120-1.el8_10`	RHSA-2026:68677
Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`tomcat-1:9.0.120-1.el8_8`	RHSA-2026:68680
Red Hat Enterprise Linux 9	`tomcat-1:9.0.110-2.el9_8`	RHSA-2026:18916
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`tomcat-1:9.0.120-1.el9_2`	RHSA-2026:68678
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	`tomcat-1:9.0.120-1.el9_4`	RHSA-2026:68679

Frequently Asked Questions

Session Fixation vulnerability in Apache Tomcat via rewrite valve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

O3 Security · Impact-Aware SCA

Is CVE-2025-55668 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE Classification

CWE-384CWE-384

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Aug 13, 2025

Last updated

Oct 29, 2026

Identifiers

CVE-2025-55668

GHSA-23hv-mwm6-g8jf

BIT-tomcat-2025-55668

References

Advisorygithub.com · CVE 2025 55668.json Advisorylists.apache.org · v6bknr96rl7l1qxkl1c03v0qdvbbqs47 Advisorynvd.nist.gov · CVE 2025 55668 Webopenwall.com Webgithub.com · 8621e4c6ba2c916a41eb34cb0f781171ead33fb6 Webgithub.com · 90306d971bb8b8393336d893644124fb2ca11d21 Webgithub.com · 9c3673ba04009377cb0c81ccb6cf5078aec1aa95 Webtomcat.apache.org · security 10 Webtomcat.apache.org · security 11 Webtomcat.apache.org · security 9 Packagegithub.com · tomcat

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting tomcat-catalina are rated as high or higher (top: critical).

CVE-2026-65905CVE-2026-65182CVE-2026-68525CVE-2026-55956CVE-2026-55957CVE-2026-53404CVE-2026-43515CVE-2026-43513

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 29, 2026

CVE-2025-55668 — tomcat-catalina

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2025-55668 in your dependencies?