netrc and default credential leak

Summary

When asked to use a `.netrc` file for credentials and to follow HTTP redirects, curl could leak the password used for the first host to the followed-to host under certain circumstances. This flaw only manifests itself if the netrc file has a `default` entry that omits both login and password. A rare circumstance.

Timeline

1. Feb 5, 2025, 9:15 AM UTCCVE published
2. Feb 5, 2025, 3:52 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: partial

3. Oct 15, 2026, 1:01 AM UTCRecord last updated

Affected versions

• curl curl

  From 8.11.1 · through 8.11.1; From 8.11.0 · through 8.11.0; From 8.10.1 · through 8.10.1; From 8.10.0 · through 8.10.0; From 8.9.1 · through 8.9.1; From 8.9.0 · through 8.9.0; From 8.8.0 · through 8.8.0; From 8.7.1 · through 8.7.1; From 8.7.0 · through 8.7.0; From 8.6.0 · through 8.6.0; From 8.5.0 · through 8.5.0; From 8.4.0 · through 8.4.0; From 8.3.0 · through 8.3.0; From 8.2.1 · through 8.2.1; From 8.2.0 · through 8.2.0; From 8.1.2 · through 8.1.2; From 8.1.1 · through 8.1.1; From 8.1.0 · through 8.1.0; From 8.0.1 · through 8.0.1; From 8.0.0 · through 8.0.0; From 7.88.1 · through 7.88.1; From 7.88.0 · through 7.88.0; From 7.87.0 · through 7.87.0; From 7.86.0 · through 7.86.0; From 7.85.0 · through 7.85.0; From 7.84.0 · through 7.84.0; From 7.83.1 · through 7.83.1; From 7.83.0 · through 7.83.0; From 7.82.0 · through 7.82.0; From 7.81.0 · through 7.81.0; From 7.80.0 · through 7.80.0; From 7.79.1 · through 7.79.1; From 7.79.0 · through 7.79.0; From 7.78.0 · through 7.78.0; From 7.77.0 · through 7.77.0; From 7.76.1 · through 7.76.1; From 7.76.0 · through 7.76.0

References 3