SRI Mojolicious up to 9.47 CSRF Token csrf_token cross-site request forgery

Summaryinfo

A vulnerability categorized as problematic has been discovered in SRI Mojolicious up to 9.47. This vulnerability affects the function csrf_token of the component CSRF Token. Executing a manipulation of the argument csrf_token can lead to cross-site request forgery. This vulnerability appears as CVE-2026-15747. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in SRI Mojolicious up to 9.47. This vulnerability affects the function csrf_token of the component CSRF Token. The manipulation of the argument csrf_token with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle. _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle. An attacker able to query it can recover the token and pass csrf_protect validation.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-15747 since 07/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 9.48 eliminates this vulnerability.

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Productinfo

Vendor

• SRI

Name

• Mojolicious

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19
• 9.20
• 9.21
• 9.22
• 9.23
• 9.24
• 9.25
• 9.26
• 9.27
• 9.28
• 9.29
• 9.30
• 9.31
• 9.32
• 9.33
• 9.34
• 9.35
• 9.36
• 9.37
• 9.38
• 9.39
• 9.40
• 9.41
• 9.42
• 9.43
• 9.44
• 9.45
• 9.46
• 9.47

CPE 2.3info

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CPE 2.2info

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