Vulnerability-Lookup

RHSA-2026:58956

Vulnerability from csaf_redhat - Published: 2026-08-24 10:53 - Updated: 2026-08-26 16:34

Summary

Red Hat Security Advisory: assertj-core security update

Severity

Moderate

Notes

Topic: An update for assertj-core is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: A rich and intuitive set of strongly-typed assertions to use for unit testing (either with JUnit or TestNG). Security Fix(es): * assertj: AssertJ: Information disclosure and denial of service via XML External Entity (XXE) (CVE-2026-24400) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-24400

A flaw was found in AssertJ. An XML External Entity (XXE) vulnerability exists in the `XmlStringPrettyFormatter` component, which is used by the `isXmlEqualTo(CharSequence)` assertion. If an application processes untrusted XML input using these methods, a remote attacker could exploit this flaw to read arbitrary local files, perform Server-Side Request Forgery (SSRF) by making the server request arbitrary URLs, or cause a Denial of Service (DoS) through entity expansion attacks.

6.1 (Medium)


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

CWE-611 - Improper Restriction of XML External Entity Reference

Affected products

Fixed 2 products

Product	Identifier	Version	Remediation
Unresolved product id: AppStream-9.2.0.Z.E4S:assertj-core-0:3.19.0-5.el9_2.2.noarch		—	Vendor Fix fix
Unresolved product id: AppStream-9.2.0.Z.E4S:assertj-core-0:3.19.0-5.el9_2.2.src		—	Vendor Fix fix

Threats

Impact Moderate

References

12 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:58956	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2433116	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-24400	self
https://bugzilla.redhat.com/show_bug.cgi?id=2433116	external
https://www.cve.org/CVERecord?id=CVE-2026-24400	external
https://nvd.nist.gov/vuln/detail/CVE-2026-24400	external
https://cheatsheetseries.owasp.org/cheatsheets/XM…	external
https://github.com/assertj/assertj/commit/85ca7eb…	external
https://github.com/assertj/assertj/releases/tag/a…	external
https://github.com/assertj/assertj/security/advis…	external

JSON

To clipboard

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CVE-2026-24400 (GCVE-0-2026-24400)

Vulnerability from cvelistv5 – Published: 2026-01-26 22:19 – Updated: 2026-01-27 21:36

Title

AssertJ has XML External Entity (XXE) vulnerability when parsing untrusted XML via isXmlEqualTo assertion

Summary

AssertJ provides Fluent testing assertions for Java and the Java Virtual Machine (JVM). Starting in version 1.4.0 and prior to version 3.27.7, an XML External Entity (XXE) vulnerability exists in `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This formatter is used by the `isXmlEqualTo(CharSequence)` assertion for `CharSequence` values. An application is vulnerable only when it uses untrusted XML input with either `isXmlEqualTo(CharSequence)` from `org.assertj.core.api.AbstractCharSequenceAssert` or `xmlPrettyFormat(String)` from `org.assertj.core.util.xml.XmlStringPrettyFormatter`. If untrusted XML input is processed by tone of these methods, an attacker couldnread arbitrary local files via `file://` URIs (e.g., `/etc/passwd`, application configuration files); perform Server-Side Request Forgery (SSRF) via HTTP/HTTPS URIs, and/or cause Denial of Service via "Billion Laughs" entity expansion attacks. `isXmlEqualTo(CharSequence)` has been deprecated in favor of XMLUnit in version 3.18.0 and will be removed in version 4.0. Users of affected versions should, in order of preference: replace `isXmlEqualTo(CharSequence)` with XMLUnit, upgrade to version 3.27.7, or avoid using `isXmlEqualTo(CharSequence)` or `XmlStringPrettyFormatter` with untrusted input. `XmlStringPrettyFormatter` has historically been considered a utility for `isXmlEqualTo(CharSequence)` rather than a feature for AssertJ users, so it is deprecated in version 3.27.7 and removed in version 4.0, with no replacement.

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:H/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-27 21:36 UTC

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/assertj/assertj/security/advis…	x_refsource_CONFIRM
https://github.com/assertj/assertj/commit/85ca7eb…	x_refsource_MISC
https://cheatsheetseries.owasp.org/cheatsheets/XM…	x_refsource_MISC
https://github.com/assertj/assertj/releases/tag/a…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
assertj	assertj	Affected: >= 1.4.0, < 3.27.7

Show details on NVD website

JSON

To clipboard

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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.