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TI-2026-76788 Aliases CVE-2026-108086GHSA-r2j3-wmm2-x45c

XML entity expansion in Apache Cocoon enables SSRF and file exposure

Priority LOW 39CWE-776Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apache Cocoon, all versions, is affected by XML entity expansion in the fp form processor. The flaw is an improper restriction of recursive entity references in DTDs (CWE-776). An unauthenticated remote attacker can make the server send requests to external systems, which can expose files from the server to an untrusted external system. The project is retired and this product is no longer supported by its maintainer.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

** UNSUPPORTED WHEN ASSIGNED ** Improper restriction of recursive entity references in DTDs ('XML entity expansion') vulnerability in Apache Cocoon. This issue affects Apache Cocoon: all versions. XEE in the fp: form processor could lead to SSRF, including exposing files from the server to an untrusted external system As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00416 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Cocoonall versions—No fix listedCNA
  • Apache Cocoon VendorApache Affected all versions Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:cocoon:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:cocoon:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

The sources list no fixed version for Apache Cocoon. The maintainer does not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-108086
  2. 2026-10-20 Alias added: GHSA-r2j3-wmm2-x45c
  3. 2026-10-29 CVSS score added · CISA ADP
  4. 2026-10-29 CISA SSVC decision points changed

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences