CVE-2026-26080

EUVD-2026-45988
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.7 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 43.73%
Affected Products (NVD)
VendorProductVersion
haproxyhaproxy
3.2 ≤
𝑥
< 3.2.12
haproxyhaproxy
3.3 ≤
𝑥
< 3.3.3
haproxyaloha
17.0.0 ≤
𝑥
< 17.0.18
haproxyaloha
17.5.0 ≤
𝑥
< 17.5.16
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
haproxyhaproxy_enterprise
3.2r1:r1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
haproxy
bookworm
2.6.12-1+deb12u3
fixed
bookworm (security)
2.6.12-1+deb12u3
fixed
bullseye
2.2.9-2+deb11u6
fixed
bullseye (security)
2.2.9-2+deb11u7
fixed
forky
3.2.22-1
fixed
sid
3.2.23-1
fixed
trixie
3.0.11-1+deb13u3
fixed
trixie (security)
3.0.11-1+deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
haproxy
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1
https://www.haproxy.org