Apache Allura up to 1.21.0 OAuth1 authentication replay

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apache Allura up to 1.21.0. The impacted element is an unknown function of the component OAuth1. The manipulation leads to authentication replay. This vulnerability is referenced as CVE-2026-92120. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache Allura up to 1.21.0. This issue affects an unknown functionality of the component OAuth1. The manipulation with an unknown input leads to a authentication replay vulnerability. Using CWE to declare the problem leads to CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

OAuth1 Request Replay Attack vulnerability in Apache Allura. This issue affects Apache Allura: through 1.21.0. Users are recommended to upgrade to version 1.22.0 which fixes the issue.

It is possible to read the advisory at lists.apache.org. The identification of this vulnerability is CVE-2026-92120 since 09/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/13/2026). The attack technique deployed by this issue is T1040 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-97832). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Apache

Name

• Allura

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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