CVE-2026-102496: Apache XMLSchema · CWE-674
Affects Apache XMLSchemaSource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 2.3.3 soon.
Data as of 12 Nov 2026, 23:24 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 45% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.3.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade Apache to 2.3.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software FoundationApache XMLSchema | Affected
| Fixed in
|
MavenApache Software Foundation/org.apache.ws.xmlschema:xmlschema-corepkg:maven/Apache Software Foundation/org.apache.ws.xmlschema:xmlschema-coreOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should upgrade Apache XMLSchema to version 2.3.3 or later, where this vulnerability is fixed.
Description
Apache XMLSchema versions prior to 2.3.3 contain a vulnerability where deeply nested schema structures can cause a stack overflow during parsing, leading to denial of service. This issue is fixed in version 2.3.3.