What is CVE-2026-26080?

CVE-2026-26080 is a low-severity vulnerability in Haproxy Aloha, classified under CWE-252. CVSS score: 3.7/10. Published 2026-07-20.

How severe is CVE-2026-26080?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Haproxy Aloha

CVE-2026-26080

HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected.

Published 2026-07-20 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (45.1th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Haproxy Aloha
Haproxy — versions 3.2, 3.3
Haproxy Enterprise — versions 3.2r1

Weakness classification (CWE)

CWE-252

References

git.haproxy.org/ (Patch, Vendor Advisory)
www.haproxy.org (Product)

Frequently asked questions

What is CVE-2026-26080?: CVE-2026-26080 is a low-severity vulnerability in Haproxy Aloha, classified under CWE-252. CVSS score: 3.7/10. Published 2026-07-20.
How severe is CVE-2026-26080?: Low severity. CVSS v3 base score is 3.7 out of 10.