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GHSA-64G6-VW43-HV3X

Vulnerability from github – Published: 2026-11-05 15:32 – Updated: 2026-11-05 15:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-103863"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-05T13:17:06Z",
    "severity": null
  },
  "details": "Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027) vulnerability in Apache Sling Engine.\u00a0Content-Type, charset, and redirect changes from an included component evade the \u00a0protectheaders\u00a0/\u00a0checkcontenttype\u00a0 enforcement through setHeader(), repeated calls to setContentType(), the charset APIs, Servlet 6.1 redirect overloads, and stale config - enabling stored XSS despite enabled protections.\n\n\n\nThis issue affects Apache Sling Engine before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue.",
  "id": "GHSA-64g6-vw43-hv3x",
  "modified": "2026-11-05T15:32:31Z",
  "published": "2026-11-05T15:32:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103863"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rll7kjtbpj2lvh4nzmrw5sdmqww64ldg"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-103863 (GCVE-0-2026-103863)

Vulnerability from cvelistv5 – Published: 2026-11-05 12:31 – Updated: 2026-11-05 22:05

Title

Apache Sling Engine: Include-protection mitigations bypassable via uncovered response-wrapper paths

Summary

Severity

No CVSS data available.

CWE

CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
CWE-693

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1170 records in the last 180 days details

References

2 references

URL	Tags
https://lists.apache.org/thread.html/rll7kjtbpj2l…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/11/05/6

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Sling Engine	Affected: 0 , < 3.0.4 (semver)

Credits

The Apache Software Foundation Claude Code

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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