---
title: "CVE-2026-61741: http4s-scala-xml - XML External Entity Injection"
description: "http4s-scala-xml < 0.24.1 and < 1.0.0-M39 contains an XML External Entity (XXE) injection caused by insecure SAXParserFactory configuration in EntityDecoder, letting attackers disclose local files, perform SSRF, or cause DoS, exploit requires parsing untrusted XML."
url: https://panop.io/threat-heartbeat/CVE-2026-61741/
---

# CVE-2026-61741 http4s-scala-xml - XML External Entity Injection

http4s-scala-xml < 0.24.1 and < 1.0.0-M39 contains an XML External Entity (XXE) injection caused by insecure SAXParserFactory configuration in EntityDecoder, letting attackers disclose local files, perform SSRF, or cause DoS, exploit requires parsing untrusted XML.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.29% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-61741)

## Details

Type

XML External Entity Injection

Impact

Information Disclosure, Server Side Request Forgery, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Published

24 September 2026

Updated

15 October 2026

Weakness

[CWE-611](https://cwe.mitre.org/data/definitions/611.html)

## Vendor fix

Upgrade to versions 0.24.1 or 1.0.0-M39 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-61741](https://nvd.nist.gov/vuln/detail/CVE-2026-61741)
- [https://github.com/http4s/http4s-scala-xml/security/advisories/GHSA-cjx3-73hr-rpw7](https://github.com/http4s/http4s-scala-xml/security/advisories/GHSA-cjx3-73hr-rpw7)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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