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Vulnerability record · CVE-2026-56232 · published 24 June 2026

CVE-2026-56232: Incorrect authorization vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.47% · top 61.9% CWE-863 · Incorrect authorization Deferred
8.7CVSS 4.0 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
25 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Cap-go/capgo/security/advisories/GHSA-2h89-vcvx-5pvh
https://www.vulncheck.com/advisories/capgo-subkey-scope-bypass-in-middlewarekey-via-x-limited-key-id-header
https://github.com/Cap-go/capgo/security/advisories/GHSA-2h89-vcvx-5pvh

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-56232), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.