Vulnerability · Published Apr 3, 2026 · Assigned by mitre
CVE-2026-26477
Medium 4.3
In plain English
A medium-severity resource allocation without limits in DokuWiki from DokuWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.5%top 60.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | dokuwiki | no fix listed | DEBIAN-CVE-2026-26477 |
| Debian:13 | dokuwiki | no fix listed | DEBIAN-CVE-2026-26477 |
| Debian:14 | dokuwiki | 2025-05-14.b+dfsg-6 | DEBIAN-CVE-2026-26477 |
| Ubuntu:22.04:LTS | dokuwiki | no fix listed | UBUNTU-CVE-2026-26477 |
| Ubuntu:24.04:LTS | dokuwiki | no fix listed | UBUNTU-CVE-2026-26477 |
| Ubuntu:25.10 | dokuwiki | no fix listed | UBUNTU-CVE-2026-26477 |
| Ubuntu:26.04:LTS | dokuwiki | no fix listed | UBUNTU-CVE-2026-26477 |
| Ubuntu:26.10 | dokuwiki | no fix listed | UBUNTU-CVE-2026-26477 |
Affected products (as reported)
Weakness: CWE-770, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L