CVE-2026-56240 | Capgo before 12.128.12 contains a billing authorization bypa… | CVSS 4.3 MEDIUM

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.

Metadata

CVE ID: CVE-2026-56240
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-19 21:50 UTC
Published: 2026-07-11 13:00 UTC
Last updated: 2026-07-11 13:00 UTC
Primary CWE: CWE-285
Improper Authorization
Vendor / Product: Capgo / Capgo
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
Capgo	Capgo	—	0 < 12.128.12, 12.128.12

Weakness (CWE)

CWE	Source	Description
CWE-285	cna	Improper Authorization

CVSS scores (2)

Score	Severity	Version	Source	Vector
5.3	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References (2)

GitHub Security Advisory (GHSA-g9fc-82c2-p2r6) https://github.com/Cap-go/capgo/security/advisories/GHSA-g9fc-82c2-p2r6
VulnCheck Advisory: Capgo - Billing Authorization Bypass via Exhausted Usage Credits https://www.vulncheck.com/advisories/capgo-billing-authorization-bypass-via-exhausted-usage-credits