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CVE-2026-15747— Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle

Quick assessment

Affected
SRI Mojolicious
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SRI Mojolicious是SRI个人开发者的一个Perl Web开发框架，集成路由、模板引擎、WebSocket、REST API和实时Web应用开发能力。 SRI Mojolicious 4.59版本至9.48之前版本存在安全漏洞，该漏洞源于会话CSRF令牌暴露给BREACH压缩甲骨文，可能导致攻击者恢复令牌并绕过csrf_protect验证。

AI Predicted 7.4 Difficulty: Moderate EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
SRI Mojolicious 4.59< 9.48 affected
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I. Basic Information for CVE-2026-15747

Vulnerability Information
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Vulnerability Title
Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
响应差异性信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
SRI Mojolicious 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SRI Mojolicious是SRI个人开发者的一个Perl Web开发框架，集成路由、模板引擎、WebSocket、REST API和实时Web应用开发能力。 SRI Mojolicious 4.59版本至9.48之前版本存在安全漏洞，该漏洞源于会话CSRF令牌暴露给BREACH压缩甲骨文，可能导致攻击者恢复令牌并绕过csrf_protect验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SRI Mojolicious 4.59 ~ 9.48 -

II. Public POCs for CVE-2026-15747

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III. Intelligence Information for CVE-2026-15747

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Patches & Fixes for CVE-2026-15747 (1)

IV. Related Vulnerabilities

Same product: Mojolicious
Same vendor: SRI
Same weakness: CWE-204