CVE-2026-80229 Details
Description
When performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership reference; destroying the easy handle prematurely frees this context while the active connection retains a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://curl.se/docs/CVE-2026-80229.html | curl | PatchVendor Advisory |
| https://curl.se/docs/CVE-2026-80229.json | curl | Vendor Advisory |
| https://hackerone.com/reports/3969255 | curl | ExploitMitigationThird Party Advisory |
Weakness Enumeration
Affected Products
| Product | Versions |
|---|---|
| haxx curl | >= 8.14.0, < 8.22.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 15, 2026 | CVE Modified | curl |
| Sep 11, 2026 | Initial Analysis | [email protected] |
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 6, 2026 | New CVE Received | curl |