Answer in brief
CVE-2026-61741 records a Critical severity (CVSS 9.3) vulnerability in http4s-scala-xml has an XML External Entity (XXE) processing issue. The current sources do not mark it as known exploited. The current feed maps http4s/http4s-scala-xml (generic), org.http4s:http4s-scala-xml_2.12 (maven), org.http4s:http4s-scala-xml_2.12 (maven), org.http4s:http4s-scala-xml_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 9.3. 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-scala-xml (generic), org.http4s:http4s-scala-xml_2.12 (maven), org.http4s:http4s-scala-xml_2.12 (maven), org.http4s:http4s-scala-xml_2.13 (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| http4s/http4s-scala-xmlgeneric | <0.24.1 || >=1.0.0-M1 <1.0.0-M39 | 0.24.1, 1.0.0-M39 |
| org.http4s:http4s-scala-xml_2.12maven | <=0.24.0 | 0.24.1 |
| org.http4s:http4s-scala-xml_2.12maven | >=0 <0.24.1 | 0.24.1 |
| org.http4s:http4s-scala-xml_2.13maven | <=0.24.0 | 0.24.1 |
| org.http4s:http4s-scala-xml_2.13maven | >=1.0.0-M1,<=1.0.0-M38.1 | 1.0.0-M39 |
| org.http4s:http4s-scala-xml_2.13maven | >=0 <0.24.1 | 0.24.1 |
| org.http4s:http4s-scala-xml_2.13maven | >=1.0.0-M1 <1.0.0-M39 | 1.0.0-M39 |
| org.http4s:http4s-scala-xml_3maven | <=0.24.0 | 0.24.1 |
| org.http4s:http4s-scala-xml_3maven | >=1.0.0-M1,<=1.0.0-M38.1 | 1.0.0-M39 |
| org.http4s:http4s-scala-xml_3maven | >=0 <0.24.1 | 0.24.1 |
| org.http4s:http4s-scala-xml_3maven | >=1.0.0-M1 <1.0.0-M39 | 1.0.0-M39 |
Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
http4s-scala-xml provides `EntityDecoder[F, scala.xml.Elem]` instances that parse XML message bodies. Prior to versions 0.24.1 and 1.0.0-M39, these decoders used a `javax.xml.parsers.SAXParserFactory` obtained from `SAXParserFactory.newInstance` without any security configuration. With the JDK's default settings, the parser resolves DOCTYPE declarations, external general and parameter entities, and external DTDs.An application that uses these decoders to parse untrusted XML is vulnerable to XML External Entity (XXE) attacks. An attacker can craft a request that discloses local files readable by the service process, performs server-side request forgery (SSRF) against internal network resources, and/or causes denial of service through entity expansion. Versions 0.24.1 and 1.0.0-M39 fix the issue.
Quoted source text, attributed separately from HOL analysis.