What is CVE-2026-56306?

CVE-2026-56306 is a medium-severity vulnerability in Capgo, classified under Improper Input Validation. CVSS score: 6.4/10. Published 2026-06-22.

How severe is CVE-2026-56306?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Improper input validation in Capgo

CVE-2026-56306

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. Re…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Capgo — versions 0, 12.128.2

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56306?: CVE-2026-56306 is a medium-severity vulnerability in Capgo, classified under Improper Input Validation. CVSS score: 6.4/10. Published 2026-06-22.
How severe is CVE-2026-56306?: Medium severity. CVSS v3 base score is 6.4 out of 10.