# CVE-2026-80229

## Summary

- **CVE ID:** CVE-2026-80229
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-416
- **Published:** Sep 6, 2026
- **Last Modified:** Sep 16, 2026

## 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.

## Affected Products

- curl — curl (8.21.0)
- curl — curl (8.20.0)
- curl — curl (8.19.0)
- curl — curl (8.18.0)
- curl — curl (8.17.0)
- curl — curl (8.16.0)
- curl — curl (8.15.0)
- curl — curl (8.14.1)
- curl — curl (8.14.0)
- curl — curl (f2ce6c46b9dcc46ced0ce43fa95176ea7599a854)

## References

- [CNA](https://curl.se/docs/CVE-2026-80229.json)
- [CNA](https://curl.se/docs/CVE-2026-80229.html)
- [CNA](https://hackerone.com/reports/3969255)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.90%
- **EPSS Percentile:** 58.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._