CVE-2026-61899: Apache Tapestry: Possible classpath file download through URL manipulation

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-10 · updated 2026-10-24
Weakness: CWE-200

Description

Vulnerability in tapestry-core in Apache Tapestry 5.5.0+ on all platforms allows attackers to download clsspath assets via specially crafted URLs. Users are recommended to upgrade to version 5.9.1, which fixes this issue.

Affected products

Apache Software Foundation Apache Tapestry: from 5.5.0 before 5.9.1 — fixed in 5.9.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Tapestry 5.9.1. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/6j3yojqrdsxkrfz52d0zjyrf5n9xttmw
http://www.openwall.com/lists/oss-security/2026/08/08/2

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