CVE-2026-61741 — http4s-scala-xml has an XML External Entity (XXE) processing issue

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
http4s / http4s-scala-xml	affected < 0.24.1; affected >= 1.0.0-M1, < 1.0.0-M39

CWE

CWE-611

References

https://github.com/http4s/http4s-scala-xml/security/advisories/GHSA-cjx3-73hr-rpw7

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.