CVE-2026-69113: Cap v0.3.1 Broken Access Control via video comment endpoint

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-10-24
Weakness: CWE-862

Description

Cap v0.3.1 contains a broken access control vulnerability in the POST /api/video/comment endpoint that allows authenticated users to post comments on any private video without permission by supplying an arbitrary videoId in the request body. Attackers can inject comments into private video recordings belonging to other users, trigger comment notification emails to the video owner, and enumerate valid video IDs through response differences.

Affected products

CapSoftware Cap: through 0.3.1

References

https://github.com/CapSoftware/Cap
https://github.com/CapSoftware/Cap/commit/1b812d88958f784ee66d2eace60e731624832c9d
https://github.com/CapSoftware/Cap/issues/1982
https://www.vulncheck.com/advisories/cap-broken-access-control-via-video-comment-endpoint
https://github.com/CapSoftware/Cap/issues/1982

Get alerted when CVE-2026-69113 or the next vulnerability affects your stack