Description
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
References
https://curl.se/docs/CVE-2026-8932.html
https://curl.se/docs/CVE-2026-8932.json
https://hackerone.com/reports/3733910
https://hackerone.com/reports/3733910
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5 · High
Information
Source identifier
2499f714-1537-4658-8207-48ae4bb9eae9
Vulnerability status
Modified
Published
2026-07-03T07:16:25.363Z
3 months agoLast modified
2026-09-15T07:16:33.407Z
3 weeks ago