NULL pointer dereference in Dlundquist Sniproxy
CVE-2026-119760
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/dlundquist/sniproxy/issues/411 (issue-tracking)
- github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/sr… (technical-description)
- github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/sr… (technical-description)
- github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b (patch)
- github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7 (patch)
- github.com/dlundquist/sniproxy (product)
- www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119760?
- CVE-2026-119760 is a high-severity vulnerability in Dlundquist Sniproxy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-10-30.
- How severe is CVE-2026-119760?
- High severity. CVSS v3 base score is 7.5 out of 10.