What is CVE-2026-61899?

CVE-2026-61899 is a high-severity vulnerability in Apache Tapestry, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-08-10.

How severe is CVE-2026-61899?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Apache Tapestry

CVE-2026-61899

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.

Vulnerability class: Information Disclosure

Published 2026-08-10 · last modified 2026-08-18.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.2th percentile), scored 2026-09-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.001

Affected products

Apache Tapestry
Apache Software Foundation Tapestry — versions 5.5.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

lists.apache.org/thread/6j3yojqrdsxkrfz52d0zjyrf5n9xttmw (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-61899?: CVE-2026-61899 is a high-severity vulnerability in Apache Tapestry, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-08-10.
How severe is CVE-2026-61899?: High severity. CVSS v3 base score is 7.5 out of 10.