What’s Vulnerable › Vulnerabilities

CVE-2026-8925: SASL double-free

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-03 · updated 2026-09-15
• Weakness: CWE-415

Description

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 products

• curl: from 8.15.0 before 8.21.0 — fixed in 8.21.0

How to fix

Upgrade to a fixed version: curl 8.21.0. Check the vendor advisory for mitigations.

References

• https://curl.se/docs/CVE-2026-8925.html
• https://curl.se/docs/CVE-2026-8925.json
• https://hackerone.com/reports/3735193
• https://hackerone.com/reports/3735193

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