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CVE-2026-56306

MEDIUM
6.4
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-56306
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-20 12:53 UTC
Published
2026-06-22 21:04 UTC
Last updated
2026-06-22 21:04 UTC
Primary CWE
CWE-20
Improper Input Validation
Vendor / Product
Capgo / Capgo
Sources
cve.org  ·  NVD

Severity & Metrics

6.4 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products (1)
VendorProductPlatformVersions
Capgo Capgo — 0 < 12.128.2, 12.128.2
Weakness (CWE)
CWESourceDescription
CWE-20 cna Improper Input Validation
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.4 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
References (2)
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