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PatchSiren cyber security CVE debrief

CVE-2026-61899 Apache Software Foundation CVE debrief

A vulnerability exists in Apache Tapestry 5.5.0+ on all platforms, allowing attackers to download classpath assets via specially crafted URLs. This issue poses a significant risk to users of Apache Tapestry 5.5.0+ as it could potentially lead to unauthorized access to sensitive data. Users are recommended to upgrade to version 5.9.1, which fixes this issue. It is crucial for operators, platform administrators, vulnerability management teams, and security teams to review and update affected systems, monitor for potential exploitation attempts, and verify affected systems. Evidence of the vulnerability's existence and impact is limited, and defenders should verify affected systems and review the official advisory for more information.

Vendor
Apache Software Foundation
Product
Apache Tapestry
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-10
Original CVE updated
2026-08-10
Advisory published
2026-08-10
Advisory updated
2026-08-10

Who should care

Users of Apache Tapestry 5.5.0+ on all platforms should be aware of this vulnerability and take steps to upgrade to version 5.9.1. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review and update affected systems, monitor for potential exploitation attempts, and verify affected systems.

Technical summary

The vulnerability exists in Apache Tapestry 5.5.0+ on all platforms, allowing attackers to download classpath assets via specially crafted URLs. The issue is fixed in version 5.9.1. This vulnerability affects users of Apache Tapestry 5.5.0+ on all platforms, and users are recommended to upgrade to version 5.9.1 to address the vulnerability. The vulnerability is related to the handling of classpath assets and the potential for unauthorized access. Further investigation is needed to fully understand the issue, and defenders should verify affected systems and review the official advisory for more information. The CVE record and NVD entry provide limited information about the vulnerability.

Defensive priority

Upgrade to version 5.9.1 of Apache Tapestry to address the vulnerability.

Recommended defensive actions

  • Upgrade to version 5.9.1 of Apache Tapestry
  • Review and update affected systems
  • Monitor for potential exploitation attempts
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is needed to fully understand the issue. The vulnerability exists in Apache Tapestry 5.5.0+ on all platforms, allowing attackers to download classpath assets via specially crafted URLs. Users are recommended to upgrade to version 5.9.1, which fixes this issue. Evidence of the vulnerability's existence and impact is limited, and defenders should verify affected systems and review the official advisory for more information.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-10T11:17:27.117Z and has not been modified since then.