What is CVE-2026-26477?

CVE-2026-26477 is a medium-severity vulnerability in Dokuwiki, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-04-03.

How severe is CVE-2026-26477?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Dokuwiki

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() function in the media.php file

Published 2026-04-03 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.006 (43.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Dokuwiki — versions 2025-05-14b

Weakness classification (CWE)

References

github.com/Hebing123/cve/issues/94 (Exploit, Third Party Advisory)
github.com/dokuwiki/dokuwiki/releases/tag/release-2025-05-14b (Release Notes)

Frequently asked questions

What is CVE-2026-26477?: CVE-2026-26477 is a medium-severity vulnerability in Dokuwiki, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-04-03.
How severe is CVE-2026-26477?: Medium severity. CVSS v3 base score is 4.3 out of 10.