Eclipse jaxb-ri: XML External Entity (XXE) injection allows local file read
Summary
The Eclipse jaxb-ri (core) JAXB implementation relied only on FEATURE_SECURE_PROCESSING to block XML External Entity (XXE) resolution, which does not stop external entities on some JAXP implementations. An attacker who can get untrusted XML unmarshalled through JAXB can read local files on the server via out-of-band XXE. The CVE data lists a CVSS 4.0 base score of 8.3 (High), and the CNA rates exploitation as none.
Affected
- jaxb-ri (core) 4.0.4 and 4.0.9 according to the CVE record
- The exact affected range is unknown; versions in between are not confirmed.
- The CNA notes that 4.0.9 is unaffected in its default configuration.
Fixed in
Unknown. Upstream pull request #2013 was merged on 8 September 2026, but no release containing the fix has been confirmed.
Workaround
- No solution or workaround is provided in the CVE record.
- Do not rely on FEATURE_SECURE_PROCESSING alone; also disable DOCTYPE declarations in XML parsers where possible.
- Restrict outbound connections from Java services, because out-of-band XXE requires the server to reach an external host.
Exploitation
- CISA SSVC: exploitation none, not automatable, partial technical impact.
- Not listed in the CISA KEV catalog at the time of research.
Our recommendation
- Inventory Java applications and products that include jaxb-ri, often as a transitive dependency.
- Check the vendor advisory and jaxb-ri releases for a fixed version and update as soon as one is available.
- Until then, apply the workarounds and monitor logs for unusual outbound requests from Java services.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Eclipse CVE work item 310 gitlab.eclipse.org
- jaxb-ri pull request 2013 github.com
- OSV entry CVE-2026-92877 osv.dev
- OpenCVE entry CVE-2026-92877 app.opencve.io
- VulDB entry 416950 vuldb.com
- OWASP XML External Entity Prevention Cheat Sheet cheatsheetseries.owasp.org
- Oracle Java API for XML Processing security guide docs.oracle.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 13:56.
Original description (NVD)
The JAXB factory methods historically relied solely on `FEATURE_SECURE_PROCESSING` to prevent XML External Entity (XXE) resolution. On JAXP implementations where that feature alone does not block external entity resolution, an attacker who can get untrusted XML unmarshalled through JAXB can read local files via out-of-band XXE.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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