Auth bypass in Capsoftware Cap
CVE-2026-69113
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Capsoftware Cap — versions 0
Weakness classification (CWE)
References
- github.com/CapSoftware/Cap (product)
- github.com/CapSoftware/Cap/commit/1b812d88958f784ee66d2eace60e731624832c9d (patch)
- github.com/CapSoftware/Cap/issues/1982 (issue-tracking)
- www.vulncheck.com/advisories/cap-broken-access-control-via-video-comment-endpoi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-69113?
- CVE-2026-69113 is a medium-severity vulnerability in Capsoftware Cap, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-11.
- How severe is CVE-2026-69113?
- Medium severity. CVSS v3 base score is 5.4 out of 10.