How severe is CVE-2026-61899?

CVE-2026-61899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-61899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-61899?

CVE-2026-61899 affects Apache Tapestry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-61899?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-61899 published?

CVE-2026-61899 was published on 2026-08-10 and last updated on 2026-08-18.

CVE-2026-61899

CVE-2026-61899 is a high-severity vulnerability in Apache Tapestry with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apache Tapestry
Published: 2026-08-10
Last modified: 2026-08-18

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-61899?: CVE-2026-61899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-61899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-61899?: CVE-2026-61899 affects Apache Tapestry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-61899?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-61899 published?: CVE-2026-61899 was published on 2026-08-10 and last updated on 2026-08-18.

References

Affected products (1)

cpe:2.3:a:apache:tapestry:*:*:*:*:*:*:*:*

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