CVE-2026-56232
HIGHCapgo - Subkey Scope Bypass in middlewareKey via x-limited-key-id Header
Title source: cnaDescription
Capgo before 12.128.2 fails to enforce limited_to_orgs and limited_to_apps constraints on subkeys provided via x-limited-key-id header in middlewareKey function. Attackers can bypass subkey scope restrictions by referencing their own subkeys, causing all downstream route handlers to use the unrestricted parent key instead of the scoped subkey.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-2h89-vcvx-5pvh)
https://github.com/Cap-go/capgo/security/advisories/GHSA-2h89-vcvx-5pvh
Third Party Advisory third-party-advisory
VulnCheck Advisory: Capgo - Subkey Scope Bypass in middlewareKey via x-limited-key-id Header
https://www.vulncheck.com/advisories/capgo-subkey-scope-bypass-in-middlewarekey-via-x-limited-key-id-header
Scores
CVSS v3
8.8
EPSS
0.0027
EPSS Percentile
18.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-863
Status
published
Products (2)
Capgo/Capgo
< 12.128.2
Capgo/Capgo
12.128.2
Published
Jun 24, 2026
Tracked Since
Jun 24, 2026