curl vulnerability

The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing the pointer in between, making it `free()` the same pointer twice.

Published 3 Jul 2026Updated 15 Sep 20266 sources
CVSS 9.8 ✓ VERIFIED REFERENCE

What happened

The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing the pointer in between, making it `free()` the same pointer twice.

Affected versions

curl: 8.15.0 through before 8.16.1 (semver); 8.17.0 through before 8.20.1 (semver); ab650379a8c25ca952f651476d25b4cdd77bb3fc through before 3da249e1f0716c06644ed3522a37a8bf81808012 (git); 8.20.0; 8.19.0; 8.18.0; 8.17.0; 8.16.0; 8.15.0 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

RepositoryAuthorFirst seenReference
hackerone.comNVD reference2026-07-03Verified