CVE-2026-92877 Eclipse Foundation CVE debrief

Who should care

Defenders and developers using jaxb-ri (core) should assess exposure and prioritize remediation due to the potential for local file reads via XXE. Verification of affected versions, implementation of secure XML unmarshalling practices, and monitoring for suspicious activity are crucial. Security teams must review the vulnerability's impact on their systems and ensure appropriate measures are taken.

Why it matters

CVE-2026-92877 is a high-severity vulnerability in Eclipse Foundation's jaxb-ri (core) that allows for potential local file reads via XXE. Defenders and developers using jaxb-ri (core) should assess exposure and prioritize remediation.

• Potential local file reads via XXE
• Verification of affected versions and remediation required
• Monitoring for suspicious XML unmarshalling activity recommended

Technical summary

The JAXB factory methods in jaxb-ri (core) rely on FEATURE_SECURE_PROCESSING to prevent XML External Entity (XXE) resolution. However, on some JAXP implementations, this feature alone does not block external entity resolution, allowing an attacker to read local files via out-of-band XXE if they can get untrusted XML unmarshalled through JAXB. Affected systems may be vulnerable to local file reads, and defenders should prioritize verifying and remediating affected versions, especially in systems handling XML unmarshalling.

Defensive priority

Defenders should prioritize verifying and remediating affected jaxb-ri (core) versions, especially in systems handling XML unmarshalling.

Recommended defensive actions

• Verify and remediate affected jaxb-ri (core) versions
• Implement secure XML unmarshalling practices
• Monitor for suspicious XML unmarshalling activity
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability. However, details on affected versions and remediation are limited. Defenders should verify the affected jaxb-ri (core) versions and assess exposure. Evidence from official sources is limited, so defenders must take a cautious approach to validating affected systems and planning remediation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.