Low severity · published Jul 20, 2026
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
3.7
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
HAProxy · HAProxy
3.2 before 3.2.12; 3.3 before 3.3.3 · source: vendor, NVD
AL
Aloha · Haproxy
17.0.0 before 17.0.18; 17.5.0 before 17.5.16 · source: NVD
HE
Haproxy Enterprise · Haproxy
3.2r1; 3.2r1; 3.2r1; 3.2r1; 3.2r1; 3.2r1; +14 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26080
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26080
Patch
https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1
Product
https://www.haproxy.org
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