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Vulnerability record · CVE-2026-75140 · published 20 August 2026

CVE-2026-75140: Allocation without limits vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.53% · top 57.8% CWE-770 · Allocation without limits Awaiting Analysis
8.7CVSS 4.0 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/jhy/jsoup/commit/862ba2f1d48ee95609183dbcfc848c9fd7afc76a
https://github.com/jhy/jsoup/pull/2556
https://www.vulncheck.com/advisories/jsoup-uncontrolled-resource-consumption-in-xmltreebuilder

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Source: NIST National Vulnerability Database (record CVE-2026-75140), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.