Answer in brief
CVE-2025-27111 records a Unknown severity vulnerability in Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection. The current sources do not mark it as known exploited. The current feed maps rack (rubygems), rack (rubygems), rack (rubygems). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps rack (rubygems), rack (rubygems), rack (rubygems). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| rackrubygems | >=0 <2.2.12 | 2.2.12 |
| rackrubygems | >=3.0 <3.0.13 | 3.0.13 |
| rackrubygems | >=3.1 <3.1.11 | 3.1.11 |
Published upstream
Mar 4, 2025
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
## 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`.
Quoted source text, attributed separately from HOL analysis.