CVE-2026-8932
incomplete mTLS config matching in conn reuse
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
Exploit maturity
Proof of concept
Popular PoC on GitHub (1 stars) — exploitation code widely available.
CVSS 7.5EPSS 0.4%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
26 Jun 2026Public PoC
03 Jul 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
curl · curlpublic PoCs found — 1
githubgithub.com/0xBlackash/CVE-2026-8932★ 1⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.