How severe is CVE-2019-10071?

CVE-2019-10071 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-10071 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10071?

CVE-2019-10071 affects Apache Tapestry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10071?

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

When was CVE-2019-10071 published?

CVE-2019-10071 was published on 2019-09-16 and last updated on 2026-06-17.

CVE-2019-10071

CVE-2019-10071 is a critical-severity vulnerability in Apache Tapestry with a CVSS 3.x base score of 9.8. 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-203.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Apache Tapestry
Published: 2019-09-16
Last modified: 2026-06-17

Description

The code which checks HMAC in form submissions used String.equals() for comparisons, which results in a timing side channel for the comparison of the HMAC signatures. This could lead to remote code execution if an attacker is able to determine the correct signature for their payload. The comparison should be done with a constant time algorithm instead.

Frequently asked questions

What is CVE-2019-10071?: The code which checks HMAC in form submissions used String.equals() for comparisons, which results in a timing side channel for the comparison of the HMAC signatures. This could lead to remote code execution if an attacker is able to determine the correct signature for their payload. The comparison should be done with a constant time algorithm instead.
How severe is CVE-2019-10071?: CVE-2019-10071 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-10071 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10071?: CVE-2019-10071 affects Apache Tapestry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10071?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-10071 published?: CVE-2019-10071 was published on 2019-09-16 and last updated on 2026-06-17.

References

Affected products (1)

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

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