CVE-2026-56306 — Capgo - Subkey Enforcement Bypass via x-limited-key-id Header Parsing
Capgo before 12.128.2 contains a weak parsing vulnerability in the x-limited-key-id header that allows attackers to bypass subkey enforcement by submitting malformed values, zer…
Published: 2026-06-22 · CVSS: 5.3 · CVSS 4.0
Capgo before 12.128.2 contains a weak parsing vulnerability in the x-limited-key-id header that allows attackers to bypass subkey enforcement by submitting malformed values, zero, or duplicate headers that result in NaN or falsy values. Remote attackers can manipulate the x-limited-key-id header to disable limited key scoping and execute requests using the main API key context instead of restricted subkey permissions.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7