CVE-2025-47914: GO-2025-4135 - Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent

CVE-2025-47914 · Severity: medium · CVSS 5.3 · Published 2025-11-19

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

Technologies: golang.org/x/crypto (Go). Vendors: Go.

Quick answers

Is CVE-2025-47914 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-47914 being exploited in the wild.
How severe is CVE-2025-47914?
Medium severity, with a CVSS score of 5.3, published 19 November 2025.
Which products and versions are affected?
golang.org/x/crypto (Go) SEMVER:introduced=0,fixed=0.45.0.
Is there a fix for CVE-2025-47914?
Yes. golang.org/x/crypto (Go): upgrade to 0.45.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-47914?
Check whether you run golang.org/x/crypto (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

  • golang.org/x/crypto (Go): upgrade to 0.45.0 or later
    go get golang.org/x/crypto@v0.45.0

Affected products

  • golang.org/x/crypto (Go) SEMVER:introduced=0,fixed=0.45.0

Identifiers

  • CVE-2025-47914
  • GHSA-f6x5-jh6r-wrfv
  • GO-2025-4135

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