Medium 6.1Published Sep 23, 2026

CVE-2026-91928Apache Sling XSS: Sanitizer bypass, uncontrolled resource consumption and failure pf protection mechanisms

Updated under an hour ago (Oct 27, 2026, 7:10 AM ET)

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It affects Apache Software Foundation Apache Sling XSS and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Sling XSS

Exploited in the last 30 days

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling XSS. This issue affects Apache Sling XSS: before 2.4.12. Users are recommended to upgrade to version 2.4.12, which fixes the issue.

CVSS: 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Sep 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Sling XSS apache_software_foundation:apache_sling_xss (from the name)	before 2.4.12	CNA record
apache sling_xss_protection_api apache:sling_xss_protection_api	before 2.4.12	NVD

References

References

https://lists.apache.org/thread/yfb1q6zob8mth5lr4jnsy3lhx9rfwb02	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/09/23/13	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.