CVE-2026-73635

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cwiki.apache.org/confluence/display/WW/S2-074	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:struts::::::::
	cpe:2.3:a:apache:struts::::::::
	cpe:2.3:a:apache:struts::::::::
	cpe:2.3:a:apache:struts::::::::

History

No history.

Information

Published : 2026-08-15 11:16

Updated : 2026-08-18 17:45

NVD link : CVE-2026-73635

Mitre link : CVE-2026-73635

CVE.ORG link : CVE-2026-73635

JSON object : View

Products Affected

apache

struts

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2026-73635", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73635", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-17T12:43:09.201224Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache Struts", "versions": [{"status": "affected", "version": "2.0.0", "versionType": "semver", "lessThanOrEqual": "2.3.37"}, {"status": "affected", "version": "2.5.0", "versionType": "semver", "lessThanOrEqual": "2.5.33"}, {"status": "affected", "version": "6.0.0", "versionType": "semver", "lessThanOrEqual": "6.10.0"}, {"status": "affected", "version": "7.0.0", "versionType": "semver", "lessThanOrEqual": "7.2.1"}], "packageName": "org.apache.struts:struts2-core", "defaultStatus": "unaffected"}]}], "published": "2026-08-15T11:16:27.540", "references": [{"url": "https://cwiki.apache.org/confluence/display/WW/S2-074", "tags": ["Vendor Advisory"], "source": "security@apache.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nThis 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.\n\nUsers are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue."}], "lastModified": "2026-08-18T17:45:16.930", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB32EC52-8599-4E6C-9F87-D2BC050A2531", "versionEndIncluding": "2.3.37", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "52DA80BB-35F0-4290-902F-66D27FB9A98F", "versionEndIncluding": "2.5.33", "versionStartIncluding": "2.5.0"}, {"criteria": "cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BC456E1-1D13-404B-A50F-A9DA579309F1", "versionEndExcluding": "6.11.0", "versionStartIncluding": "6.0.0"}, {"criteria": "cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "54C39F3E-9829-4AB5-80DD-920D4F86ED0E", "versionEndExcluding": "7.3.0", "versionStartIncluding": "7.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}