CVE-2026-39833

Name: CVE-2026-39833
Creator: NVD / NIST
Published: 2026-05-22T04:16:22.773+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2026-39833 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.36%

27.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Golang	Crypto	< 0.52.0

References

https://go.dev/cl/778640Issue Tracking
https://go.dev/cl/778641Issue Tracking
https://go.dev/issue/79436Issue Tracking
https://groups.google.com/g/golang-announce/c/a082jnz-LvIMailing List
https://pkg.go.dev/vuln/GO-2026-5005Vendor Advisory

Timeline

Published: May 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39833?

How severe is CVE-2026-39833?

CVE-2026-39833 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39833?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39833?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST