# CVE-2026-84155: CodeChecker session token remains valid after logout

Source: https://junglewise.ai/threats/cve-2026-84155-codechecker-s-web-server-fails-to-fully-invalidate-a-session  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-84155 · Severity: info · Published 2026-11-06

CodeChecker is a source code analysis tool that provides a web-based interface for viewing code review results. When running with multiple API worker processes (the default configuration), logging out fails to fully invalidate session tokens on all workers, allowing an attacker who has captured a valid token to continue impersonating a user for up to 5 minutes after logout. This creates a session hijacking risk for leaked or intercepted tokens.

Technologies: [Ericsson Codechecker](https://junglewise.ai/threats/technologies/ericsson-codechecker). Vendors: [Ericsson](https://junglewise.ai/threats/vendors/ericsson).

## Quick answers

**Is CVE-2026-84155 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84155 being exploited in the wild.

**How severe is CVE-2026-84155?** Informational severity, published 6 November 2026.

**Which products and versions are affected?** Ericsson Codechecker before 6.29.3.

**Is there a fix for CVE-2026-84155?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-84155 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-84155?** Check whether you run Ericsson Codechecker at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an insufficient session invalidation flaw in CodeChecker's multi-worker session management. Each worker process maintains a separate in-memory session cache that checks only timestamps, and logout invalidates sessions globally in the database but only locally in the calling worker's cache. Other workers continue to accept the destroyed token from their stale cached copies until the session lifetime expires, allowing post-logout token reuse via load-balanced routing to non-invalidating workers.

## Affected products

- Ericsson CodeChecker before 6.29.3

## Timeline

- 2026-11-05: disclosed

## References

- [https://github.com/Ericsson/codechecker/security/advisories/GHSA-r42x-9wgw-cqc2](https://github.com/Ericsson/codechecker/security/advisories/GHSA-r42x-9wgw-cqc2)

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