CVE-2026-56240 | THREATINT

Description

Capgo before 12.128.12 contains a billing authorization bypass vulnerability in the plan_valid calculation that allows organizations with exhausted or expired usage credit grants to bypass billing gates. Attackers can exploit the divergence between the plugin hot-path plan_valid expression and the authoritative billing gate to gain continued access to /updates, /stats, /channel_self, and attachment upload endpoints after credit depletion.

PUBLISHED Reserved 2026-06-19 | Published 2026-07-11 | Updated 2026-07-13 | Assigner VulnCheck

MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

Improper Authorization

Product status

Default status

unaffected

Any version before 12.128.12

affected

12.128.12 (semver)

unaffected

Credits

Judel777 reporter

References

github.com/.../capgo/security/advisories/GHSA-g9fc-82c2-p2r6 exploit

github.com/.../capgo/security/advisories/GHSA-g9fc-82c2-p2r6 (GitHub Security Advisory (GHSA-g9fc-82c2-p2r6)) vendor-advisory

www.vulncheck.com/...tion-bypass-via-exhausted-usage-credits (VulnCheck Advisory: Capgo - Billing Authorization Bypass via Exhausted Usage Credits) third-party-advisory

cve.org (CVE-2026-56240)

nvd.nist.gov (CVE-2026-56240)

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