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TI-2026-85397 Aliases CVE-2026-103863GHSA-64g6-vw43-hv3x

Cross-site scripting bypasses protections in Apache Sling Engine

Priority LOW 22CWE-693Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
—
Impact type
Security bypass, Cross-site scripting
Confidentiality · integrity · availability
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Fix status
Fixed

No CVSS vector from any source. Fix status from CNA. Impact type from CWE-693 and CWE-79.

Summary

Apache Sling Engine before 3.0.4 contains a cross-site scripting flaw (CWE-79). Content-Type, charset and redirect changes made by an included component evade the protectheaders and checkcontenttype enforcement, which enables stored cross-site scripting even when those protections are enabled.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling Engine. Content-Type, charset, and redirect changes from an included component evade the  protectheaders / checkcontenttype  enforcement through setHeader(), repeated calls to setContentType(), the charset APIs, Servlet 6.1 redirect overloads, and stale config - enabling stored XSS despite enabled protections. This issue affects Apache Sling Engine before 3.0.4. Users are recommended to upgrade to version 3.0.4, which fixes the issue.

Why it matters now

EPSS 0.00228 13th percentileScored 2026-11-07
Fix Fixed Apache Sling Engine (Apache Software Foundation): 3.0.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Sling Enginebefore 3.0.43.0.4Patch availableCNA
  • Apache Sling Engine VendorApache Affected before 3.0.4 Fixed in 3.0.4 Patch available CNA

Remediation

Upgrade Apache Sling Engine to version 3.0.4, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Apache Sling Engine (Apache Software Foundation) Fixed in 3.0.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Sling Engine 3.0.4

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-85399 Apache Sling Engine parameter parser enables HTTP request smugglingPriority LOW 22
    • TI-2026-85398 Log injection in Apache Sling Engine via unneutralized request valuesPriority LOW 22
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-103863
  2. 2026-11-05 Alias added: GHSA-64g6-vw43-hv3x
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences