CVE-2026-26995: uTLS has a fingerprint vulnerability from missing padding extension for Chrome 120

CVE-2026-26995 · Severity: medium · CVSS 4 · Published 2026-02-24

Fingerprint vulnerability in uTLS from missing padding extension for Chrome 120 in github.com/refraction-networking/utls

Technologies: github.com/refraction-networking/utls (Go). Vendors: Go.

Quick answers

Is CVE-2026-26995 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-26995 being exploited in the wild.
How severe is CVE-2026-26995?
Medium severity, with a CVSS score of 4, published 24 February 2026.
Which products and versions are affected?
github.com/refraction-networking/utls (Go) SEMVER:introduced=1.6.0,fixed=1.8.2.
Is there a fix for CVE-2026-26995?
Yes. github.com/refraction-networking/utls (Go): upgrade to 1.8.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-26995?
Check whether you run github.com/refraction-networking/utls (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/refraction-networking/utls (Go): upgrade to 1.8.2 or later
    go get github.com/refraction-networking/utls@v1.8.2

Affected products

  • github.com/refraction-networking/utls (Go) SEMVER:introduced=1.6.0,fixed=1.8.2

Identifiers

  • CVE-2026-26995
  • GHSA-rrxv-pmq9-x67r
  • GO-2026-4512

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