Asymmetric Resource Consumption (Amplification) Affecting kots-compat package, versions <1.129.1-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-KOTSCOMPAT-14913083
  • published12 Jan 2026
  • disclosed4 Dec 2025

Introduced: 4 Dec 2025

CVE-2025-66506  (opens in a new tab)
CWE-405  (opens in a new tab)

How to fix?

Upgrade Chainguard kots-compat to version 1.129.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kots-compat package and not the kots-compat package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request with an (invalid) OIDC identity token in the payload containing many period characters, a call to extractIssuerURL incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This vulnerability is fixed in 1.8.3.

CVSS Base Scores

version 3.1