TI-2026-51719 Aliases CVE-2026-73635 GHSA-prrh-5r25-ch75

Apache Struts: Unbounded growth of localized-text caches driven by the request locale

LOW 39CWE-770Published 2026-08-15 · Updated 2026-08-17

Key facts

Attack vector: Network
Privileges required: None
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

Allocation of resources without limits or throttling vulnerability in Apache Struts. When no fixed locale is configured, the locale used for localized-text lookups is taken from the incoming request, allowing an unauthenticated remote client to cause the framework's internal localized-text caches to grow without bound and exhaust the Java heap, denying service to other users. Applications that configure a fixed locale are not affected. This issue affects Apache Struts: from 2.0.0 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.10.0, from 7.0.0 through 7.2.1. Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00451 39th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	Apache Struts	2.0.0 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 – 6.10.0; 7.0.0 – 7.2.1	—	No fix listed	CNA

Apache Struts VendorApache Affected 2.0.0 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 – 6.10.0; 7.0.0 – 7.2.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:struts::::::::	2.0.0 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 to before 6.11.0; 7.0.0 to before 7.3.0	Vulnerable	Apache

cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:* Versions 2.0.0 – 2.3.37; 2.5.0 – 2.5.33; 6.0.0 to before 6.11.0; 7.0.0 to before 7.3.0 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 4 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Fuse 7

Timeline

2026-10-02 Threatist record created from CVE-2026-73635
2026-10-03 Alias added: GHSA-prrh-5r25-ch75
2026-10-23 EPSS moved to the below the 50th percentile
2026-10-23 Priority changed: MEDIUM → LOW

References

Advisory 1

https://cwiki.apache.org/confluence/display/WW/S2-074

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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