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CVE-2025-27111— Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection

Quick assessment

Affected
rack rack
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.

Rack是Rack开源的一个模块化的Ruby web服务器界面。 Rack 2.2.12之前版本、3.0.13之前版本和3.1.11之前版本存在安全漏洞，该漏洞源于存在日志注入问题。

AI Predicted 5.3 Difficulty: Easy EPSS 0.76% · P54

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2025-27111

Vulnerability Information
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Vulnerability Title
Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Rack is a modular Ruby web server interface. The Rack::Sendfile middleware logs unsanitised header values from the X-Sendfile-Type header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection. This vulnerability is fixed in 2.2.12, 3.0.13, and 3.1.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Rack 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rack是Rack开源的一个模块化的Ruby web服务器界面。 Rack 2.2.12之前版本、3.0.13之前版本和3.1.11之前版本存在安全漏洞，该漏洞源于存在日志注入问题。
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
rack rack < 2.2.12 -

II. Public POCs for CVE-2025-27111

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III. Intelligence Information for CVE-2025-27111

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Patches & Fixes for CVE-2025-27111 (3)

Vendor Advisories for CVE-2025-27111 (1)

IV. Related Vulnerabilities

Same product: rack
Same vendor: rack
Same weakness: CWE-93

V. Comments for CVE-2025-27111

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