Apache Sling Resource Merger: Requests to certain paths managed by the Apache Sling Resource Merger can lead to DoS

published 2023-03-20 3 y ago modified 2026-06-17 4 mo ago also GHSA-rwrx-x2hw-9h5w , EUVD-2023-1104

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

Excessive Iteration vulnerability in Apache Software Foundation Apache Sling Resource Merger.This issue affects Apache Sling Resource Merger: from 1.2.0 before 1.4.2.

Patch / fix

fixed in 2

maven org.apache.sling:org.apache.sling.resourcemerger 1.4.2
Apache Software Foundation Apache Sling Resource Merger 1.4.2

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 20 mo ago (2025-02-13)

Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.sling:org.apache.sling.resourcemerger	>=1.2.0, <1.4.2	1.4.2

Affected products

Apache Software Foundation Apache Sling Resource Merger

Classification

Weakness

CWE-834 Excessive Iteration

References

lists.apache.org /thread/xpcpo1y88ldss5hgmvogsf6h3735l5zb
vendor-advisory, web, mailing-list
nvd.nist.gov /vuln/detail/CVE-2023-26513
advisory
issues.apache.org /jira/browse/SLING-11776
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary