CVE-2026-100707CWE-22path-traversal

CVE-2026-100707

High · published September 26, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
38.9
In the wild
Unconfirmed
What it is

Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution. A low-privilege tenant can use percent-encoded dot-segments in urlPath to bypass namespace checks and read resources from other namespaces using the Kyverno admission controller's ServiceAccount credentials.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00460 · 38.9th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-09-26T18:16Z
References (2)
https://github.com/kyverno/kyverno/security/advisories/GHSA-c5qq-7g2q-cpqp · [email protected]https://www.vulncheck.com/advisories/kyverno-before-1.19.1-namespace-isolation-bypass-via-percent-encoded-path · [email protected]
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:24Z
    Kyverno before 1.19.1 Namespace Isolation Bypass via Percent-Encoded Path
    cvelistv5