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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b
https://www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-via-resolv-cancel

Configurations

No configuration.

History

30 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-30 18:17

Updated : 2026-10-30 19:23

NVD link : CVE-2026-119760

Mitre link : CVE-2026-119760

CVE.ORG link : CVE-2026-119760

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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