CVE-2026-119760
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 30, 2026
Vendor
unknown
Description
sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.
References
- https://github.com/dlundquist/sniproxy
- https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/connection.c#L737-L738
- https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/resolv.c#L219-L224
- https://github.com/dlundquist/sniproxy/issues/411
- https://github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7