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CVE-2025-27111

Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection

HIGH
7.5
CVSS Score
Published: March 4, 2025 at 03:26 PM UTC
Updated: June 17, 2026 at 09:03 AM UTC
1 product affected across 1 vendorRack

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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rack· Rackrubygems
95%
v < 2.2.12v < 3.0.13v < 3.1.113.0.0 ≤ v < 3.0.133.1.0 ≤ v < 3.1.11
Affected range stops below 2.2.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.1.11, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53
x_refsource_MISCPatch
Source: [email protected]
https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b
x_refsource_MISCPatch
Source: [email protected]
https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3
x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-93CWE-117

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