Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-1094383proxy 0.9.7 - 1.0.1 Uninitialized Stack Memory Disclosure via SOCKS4

Medium 5.3

In plain English

A medium-severity security flaw in 3proxy from 3proxy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 70.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

3proxy from 0.9.7 through 1.0.1, fixed in commit 206c923, contains an uninitialized stack memory disclosure vulnerability that allows unauthenticated attackers to leak stack bytes via the SOCKS4 reply path when the external-NAT option (-Ne) is configured. Attackers can send a client probe that fails the SOCKS version check to trigger a reply containing uninitialized bytes from the sin structure, exposing high bytes of a userspace pointer that weakens ASLR protections.

Affected products (as reported)

Vendor	Product	Versions
3proxy	3proxy	0.9.7 – through 1.0.1

Weakness: CWE-908 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Patch Commit patch, issue-tracking
VulnCheck Advisory: 3proxy 0.9.7 - 1.0.1 Uninitialized Stack Memory Disclosure via SOCKS4 third-party-advisory