🛡️ CVE-2025-27111 — rack

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-117 OSV
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection

Summary

Rack::Sendfile can be exploited by crafting input that includes newline characters to manipulate log entries.

Details

The Rack::Sendfile middleware logs unsanitized 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.

Impact

This vulnerability can distort log files, obscure attack traces, and complicate security auditing.

Mitigation

  • Update to the latest version of Rack, or
  • Remove usage of Rack::Sendfile.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Affected software

CVE-2025-27111 is recorded against 1 package.

  • rack (from 3.1 up to 3.1.11)

Timeline and source

Published on 4 March 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)
lists.debian.org (Web)

CVE-2025-27111 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE CWE-117
Public Exploit ✅ No
Source OSV
Published 2025-03-04
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
rack 3.1 3.1.11

Similar Threats

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