HAProxy ALOHA/Community Edition/Enterprise up to 3.2.11/3.3.2 varint infinite loop

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k2.16-

Summaryinfo

A vulnerability identified as critical has been detected in HAProxy ALOHA, Community Edition and Enterprise up to 3.2.11/3.3.2. This affects an unknown function of the component varint. This manipulation causes infinite loop. This vulnerability is handled as CVE-2026-26080. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in HAProxy ALOHA, Community Edition and Enterprise up to 3.2.11/3.3.2 and classified as critical. Affected by this vulnerability is some unknown functionality of the component varint. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

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.

This vulnerability is known as CVE-2026-26080 since 02/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 3.2.12 or 3.3.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: ALOHA/Community Edition/Enterprise 3.2.12/3.3.3

Timelineinfo

02/11/2026 CVE reserved
07/20/2026 +158 days Advisory disclosed
07/20/2026 +0 days VulDB entry created
07/20/2026 +0 days VulDB entry last update

Sourcesinfo

Status: Confirmed

CVE: CVE-2026-26080 (🔒)
GCVE (CVE): GCVE-0-2026-26080
GCVE (VulDB): GCVE-100-380641

Entryinfo

Created: 07/20/2026 18:23
Changes: 07/20/2026 18:23 (53)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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