HAProxy ALOHA/HAProxy up to 3.0.11/3.1.13/3.2.11/3.3.2 NEW_TOKEN buffer overflow

Summaryinfo

A vulnerability labeled as very critical has been found in HAProxy ALOHA and HAProxy up to 3.0.11/3.1.13/3.2.11/3.3.2. This impacts an unknown function of the component NEW_TOKEN. Such manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2026-26081. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in HAProxy ALOHA and HAProxy up to 3.0.11/3.1.13/3.2.11/3.3.2 and classified as very critical. Affected by this issue is an unknown part of the component NEW_TOKEN. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

This vulnerability is handled as CVE-2026-26081 since 02/11/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/20/2026).

Upgrading to version 3.0.12, 3.1.14, 3.2.12 or 3.3.3 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Firewall Software

Vendor

• HAProxy

Name

• ALOHA
• HAProxy

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6
• 3.1.7
• 3.1.8
• 3.1.9
• 3.1.10
• 3.1.11
• 3.1.12
• 3.1.13
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8
• 3.2.9
• 3.2.10
• 3.2.11
• 3.3.0
• 3.3.1
• 3.3.2

License

• open-source

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

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Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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