CVE-2026-119760

high

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://www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-via-resolv-cancel

https://github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b

https://github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7

https://github.com/dlundquist/sniproxy/issues/411

https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/resolv.c#L219-L224

https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/connection.c#L737-L738

https://github.com/dlundquist/sniproxy

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114237

Details

Source: Mitre, NVD

Published: 2026-10-30

Updated: 2026-10-30

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00477