Vulnerability · Published Jul 20, 2026 · Assigned by mitre
CVE-2026-26081
Medium 4.8
In plain English
A medium-severity security flaw in HAProxy from HAProxy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.5%top 58.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise and ALOHA are also affected.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | haproxy | 3.0.11-1+deb13u2 | DEBIAN-CVE-2026-26081 |
| Debian:13 | haproxy | 3.0.11-1+deb13u2 | DSA-6130-1 |
| Debian:14 | haproxy | 3.2.11-2 | DEBIAN-CVE-2026-26081 |
| Ubuntu:25.10 | haproxy | 3.0.12-0ubuntu0.25.10.3 | UBUNTU-CVE-2026-26081 |
Affected products (as reported)
Weakness: CWE-130 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L