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01 Record

CVE-2026-66090

XML External Entity (XXE) Injection in Metadata Field Allows Arbitrary File Read

HighPUBLISHEDCNA: MON-CSIRT
CNA base score7.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N

02 Description

XML External Entity (XXE) Injection in Metadata Field Allows Arbitrary File Read

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
The NVD has published no score for this record
NVD CVSS vector
No NVD score to derive
NVD analysis status
Not recorded
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-29 01:37Z1 HR AGO
Last updated
2026-10-29 02:02Z1 HR AGO
Reserved
2026-07-24
Assigning CNA
MON-CSIRT
Record state
PUBLISHED
Severity
High (CVSS 7.1)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
Weaknesses
  • CWE-611Improper Restriction of XML External Entity ReferenceBase
Data version
5.2
Document digest
e8f61fd064c3a0d146e03da09dca7d09ff1cbf16dd06fd6ac09813afd5342f0e

05 Affected products

VendorProductVersionsPlatforms
Apereo FoundationopenEQUELLA0 to < 2026.1—

06 References

07 Remediation

Update to vendor recommended versions