CVE-2026-102497: 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-walkerpkg:maven/Apache Software Foundation/org.apache.ws.xmlschema:xmlschema-walkerOther 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
Upgrade Apache XMLSchema to version 2.3.3 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
Description
CVE-2026-102497 is a denial of service vulnerability in Apache XMLSchema's xmlschema-walker component. The walker does not detect cycles in type derivation, substitution groups, model groups, or attribute groups, which can cause recursive stack overflow. This issue is fixed in Apache XMLSchema version 2.3.3. Users running versions prior to 2.3.3 are vulnerable to this denial of service attack.