Auth bypass in Capgo
CVE-2026-56250
Capgo before 12.128.2 allows upload-scoped API keys to modify the mutable app_versions.r2_path field through PostgREST, enabling retargeting to arbitrary R2 bundle objects. Attackers can patch r2_path to point to victim objects, soft-delete the attacker-controlled version, and trigger the on_version_update cleanup function to delete the victim R2 object, causing denial of service and bundle availability disruption.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% 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: 0.005 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-pw8p-5jg6-cxj3 (vendor-advisory)
- www.vulncheck.com/advisories/capgo-arbitrary-r2-object-deletion-via-mutable-r2-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56250?
- CVE-2026-56250 is a high-severity vulnerability in Capgo, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-07-08.
- How severe is CVE-2026-56250?
- High severity. CVSS v3 base score is 7.5 out of 10.