Unchecked Input for Loop Condition Affecting golang-misc package, versions <0:1.25.11-1.amzn2.0.1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.94% (57th percentile)

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  • Snyk IDSNYK-AMZN2-GOLANGMISC-17406736
  • published23 Jun 2026
  • disclosed2 Jun 2026

Introduced: 2 Jun 2026

CVE-2026-27145  (opens in a new tab)
CWE-606  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 golang-misc to version 0:1.25.11-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2026-3383.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-misc package and not the golang-misc package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, ".") to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.

CVSS Base Scores

version 3.1