CVE-2026-75140: Red Hat Denial of Service via deeply nested XML documents
This Red Hat advisory covers CVE-2026-75140 in Red Hat build of Quarkus 3.27.5.SP2, Red Hat build of Quarkus 3.33.3.SP2 and OpenShift Developer Tools and Services 4.12.
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- 1.23.2, jsoup, ocp-tools-4/jenkins-rhel8:1792044326 and 23 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
jsoup through 1.23.2, fixed in commit 862ba2f, contains an uncontrolled resource consumption vulnerability in XmlTreeBuilder that allows remote attackers to exhaust JVM heap memory by supplying a deeply nested XML document with uniquely-namespaced elements.
The builder copies the entire inherited namespace map on every start element, causing quadratic time and memory complexity, which attackers can exploit to trigger an OutOfMemoryError and terminate the application. A flaw was found in jsoup.
Successful exploitation could exhaust JVM heap memory, resulting in an OutOfMemoryError and terminating the application, effectively causing a Denial of Service (DoS). Parsing deeply nested XML documents can cause a denial of service via excessive stack consumption, leading to a StackOverflowError.
An attacker who can supply untrusted XML input to an application using jsoup for parsing can exploit this to crash the application or exhaust system resources. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-1050.
Affected products named by the advisory: Red Hat build of Quarkus 3.27.5.SP2; Red Hat build of Quarkus 3.33.3.SP2; OpenShift Developer Tools and Services 4.12; OpenShift Developer Tools and Services 4.13; and 19 more.
Text from the source record.
How to fix CVE-2026-75140
Upgrade to a fixed release named by Red Hat:
- 1.23.2
- jsoup
- ocp-tools-4/jenkins-rhel8:1792044326
- ocp-tools-4/jenkins-rhel8:1792044327
- ocp-tools-4/jenkins-rhel8:1792044382
- ocp-tools-4/jenkins-rhel8:1792044386
- ocp-tools-4/jenkins-rhel9:1792040287
- ocp-tools-4/jenkins-rhel9:1792040131
- ocp-tools-4/jenkins-rhel9:1792041514
- ocp-tools-4/jenkins-rhel9:1792040733
- ocp-tools-4/jenkins-rhel9:1792040081
- ocp-tools-4/jenkins-rhel9:1792040096
- ocp-tools-4/jenkins-rhel9:1792040428
- RHSA-2026:69470
- RHSA-2026:69440
- RHSA-2026:88152
- RHSA-2026:88149
- RHSA-2026:88151
- RHSA-2026:88150
- RHSA-2026:88156
- RHSA-2026:88159
- RHSA-2026:88153
- RHSA-2026:88158
- RHSA-2026:88157
- RHSA-2026:88155
and 1 more in the Red Hat advisory.
Vendor guidance
- Validate and limit the nesting depth of XML documents before passing them to jsoup for parsing. Applications should implement input size limits and consider using iterative XML parsers for untrusted input. Where possible, restrict the sources of XML input to trusted origins only.
End-of-life dates for Red Hat Enterprise Linux
CVE-2026-75140 in other vendors' advisories
- Atlassian: CVE-2026-75140, high severity, fixed in Bamboo Data Center and Server: 12.1.12 (LTS) recommended Data Center Only, Bamboo Data Center and Server: 10.2.24 (LTS) Data Center Only, Bitbucket Data Center and Server: 10.5.1 Data Center Only and 7 more
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