Answer in brief
CVE-2026-69201 records a Medium severity (CVSS 5.9) vulnerability in Http4s: ResourceService and Webjar Service path escape via percent-encoded separators. The current sources do not mark it as known exploited. The current feed maps http4s/http4s (generic), org.http4s:http4s-server_2.12 (maven), org.http4s:http4s-server_2.12 (maven), org.http4s:http4s-server_2.13 (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.9. 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 http4s/http4s (generic), org.http4s:http4s-server_2.12 (maven), org.http4s:http4s-server_2.12 (maven), org.http4s:http4s-server_2.13 (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| http4s/http4sgeneric | < 0.23.35 || >= 1.0.0-M1, < 1.0.0-M47 | Not reported |
| org.http4s:http4s-server_2.12maven | <=0.23.34 | 0.23.35 |
| org.http4s:http4s-server_2.12maven | >=0 <0.23.35 | 0.23.35 |
| org.http4s:http4s-server_2.13maven | <=0.23.34 | 0.23.35 |
| org.http4s:http4s-server_2.13maven | >=1.0.0-M1,<=1.0.0-M46 | 1.0.0-M47 |
| org.http4s:http4s-server_2.13maven | >=1.0.0-M1 <1.0.0-M47 | 1.0.0-M47 |
| org.http4s:http4s-server_2.13maven | >=0 <0.23.35 | 0.23.35 |
| org.http4s:http4s-server_3maven | >=0 <0.23.35 | 0.23.35 |
| org.http4s:http4s-server_3maven | >=1.0.0-M1 <1.0.0-M47 | 1.0.0-M47 |
| org.http4s:http4s-server_3maven | <=0.23.34 | 0.23.35 |
| org.http4s:http4s-server_3maven | >=1.0.0-M1,<=1.0.0-M46 | 1.0.0-M47 |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 15, 2026
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segment but reject only segments exactly equal to an empty string, a dot, or two dots. A request containing percent-encoded slash or backslash separators can turn an accepted segment into a parent-directory traversal after decoding, allowing access to classpath or WebJar resources outside the configured base when a directory-backed classpath is served and the backend preserves the encoded separator. The patch rejects decoded segments containing slash or backslash in ResourceService and WebjarService, and applies the same guard to the non-exploitable FileService for consistency. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Quoted source text, attributed separately from HOL analysis.