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TI-2026-67839 Aliases CVE-2026-104713GHSA-3fxc-fh79-w9fr

Unbounded request body read in Apache Struts REST plugin

Priority LOW 30CWE-770Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-770.

Summary

Apache Struts versions from 2.1.8 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.11.0 and from 7.0.0 through 7.3.0 are affected. The REST plugin reads a request body into memory without any bound on its size (CWE-770). A remote attacker with low privileges can send one large request that makes the server allocate memory in proportion to its size, exhausting the Java heap and denying service to other users. Applications that do not use the REST plugin are not affected.

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

Description from the CNA

Allocation of resources without limits or throttling vulnerability in the Apache Struts REST plugin. A request body is read into memory without any bound on how much will be accepted, so a single request can cause the server to allocate memory in proportion to its size, exhausting the Java heap and denying service to other users. No additional setting has to be enabled. Applications that do not use the REST plugin are not affected. This issue affects Apache Struts: from 2.1.8 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0. Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0056 46th 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
No
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 Struts2.1.8 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 – 6.11.0; 7.0.0 – 7.3.0—No fix listedCNA
  • Apache Struts VendorApache Affected 2.1.8 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 – 6.11.0; 7.0.0 – 7.3.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*2.1.8 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 to before 6.12.0; 7.0.0 to before 7.4.0VulnerableApache
  • cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:* Versions 2.1.8 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 to before 6.12.0; 7.0.0 to before 7.4.0 Vulnerable ·Apache

Remediation

Upgrade Apache Struts to version 6.12.0 or 7.4.0, which fix the issue.

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

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-104713
  2. 2026-10-06 Alias added: GHSA-3fxc-fh79-w9fr
  3. 2026-10-06 CVSS score added · CISA ADP
  4. 2026-10-06 CISA SSVC decision points changed
  5. 2026-10-09 EPSS moved to the 50th–90th percentile
  6. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 2

  • TI-2020-13278 Expression language injection in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-07171 Improper input validation in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2013-02013 Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL… KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-00357 The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-08433 Improper input validation in Apache Struts KEVCVSS 3.1HIGH 8.1
See all 98 →

Sources

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