# CVE-2026-61525: Zammad path traversal in session management

Source: https://junglewise.ai/threats/cve-2026-61525-zammad-is-a-web-based-open-source-helpdesk-customer-support  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-61525 · Severity: info · Published 2026-09-25

Zammad is a web-based helpdesk and customer support system used by organizations to manage customer inquiries. An authenticated user with low privilege can craft a malicious session identifier that allows them to delete arbitrary files and directories on the server, potentially causing data loss or system outages. This vulnerability only affects systems using the default file-based session storage; those configured with Redis are not affected.

Technologies: [Zammad](https://junglewise.ai/threats/technologies/zammad). Vendors: [Zammad](https://junglewise.ai/threats/vendors/zammad).

## Quick answers

**Is CVE-2026-61525 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-61525 being exploited in the wild.

**How severe is CVE-2026-61525?** Informational severity, published 25 September 2026.

**Which products and versions are affected?** Zammad 7.0.2 and 7.1.0.

**Is there a fix for CVE-2026-61525?** A patch was published on 2026-06-22: Fix committed; versions 7.0.3 and 7.1.1 contain the patch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-61525 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-61525?** Check whether you run Zammad 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

A path traversal vulnerability exists in Zammad's session management for websocket and long-polling connections. The application insufficiently validates session identifiers supplied by the client before using them to construct file paths in the session store. An authenticated attacker can manipulate the client_id parameter with path traversal sequences (e.g., "../") to reference files outside the intended session storage directory and delete them. The fix introduces a valid_client_id? validation function to sanitize identifiers before use.

## Affected products

- Zammad Zammad 7.0.2 and 7.1.0

## Timeline

- 2026-09-25: disclosed
- 2026-06-22: patched: Fix committed; versions 7.0.3 and 7.1.1 contain the patch

## References

- [https://github.com/zammad/zammad/commit/cf3425712e8fae1bd40fa5814a49dc318dc84006](https://github.com/zammad/zammad/commit/cf3425712e8fae1bd40fa5814a49dc318dc84006)
- [https://github.com/zammad/zammad/commit/f78ef2434fd8aad6c2fb8a702788f6e3f33565f6](https://github.com/zammad/zammad/commit/f78ef2434fd8aad6c2fb8a702788f6e3f33565f6)

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