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Description

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.

PUBLISHED Reserved 2026-06-19 | Published 2026-07-08 | Updated 2026-07-08 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Missing Authorization

Product status

Default status
unaffected

Any version before 12.128.2
affected

12.128.2 (semver)
unaffected

Credits

Judel777 reporter

References

github.com/.../capgo/security/advisories/GHSA-pw8p-5jg6-cxj3 exploit

github.com/.../capgo/security/advisories/GHSA-pw8p-5jg6-cxj3 (GitHub Security Advisory (GHSA-pw8p-5jg6-cxj3)) vendor-advisory

www.vulncheck.com/...ion-via-mutable-r2-path-in-app-versions (VulnCheck Advisory: Capgo - Arbitrary R2 Object Deletion via Mutable r2_path in app_versions) third-party-advisory

cve.org (CVE-2026-56250)

nvd.nist.gov (CVE-2026-56250)

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