CVE-2026-56331

Capgo - Improper Error Handling in Accept Invitation Endpoint via Invalid Magic String

CVSS 6.9 MEDIUMEPSS 0.3%CWE-209

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 6.9EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Ciclo de vida

30 jun 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Capgo before 12.128.2 contains improper error handling in the /private/accept_invitation endpoint that returns HTTP 500 instead of safe 4xx errors when magic_invite_string is invalid. Attackers can trigger this vulnerability using only the public key by submitting malformed magic_invite_string values to cause server errors and leak internal processing details.

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

Productos afectados

Capgo · Capgo

Referencias

https://github.com/Cap-go/capgo/security/advisories/GHSA-34p8-fh3m-376x https://www.vulncheck.com/advisories/capgo-improper-error-handling-in-accept-invitation-endpoint-via-invalid-magic-string