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Vulnerability record · CVE-2021-26296 · published 19 February 2021

CVE-2021-26296: Apache myfaces cross-site request forgery vulnerability

Apache · Myfaces

In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application.

7.5 CVSS 3.1 High EPSS 2.9% · top 13.6% CWE-352 · Cross-site request forgery
7.5CVSS 3.1 base score, v2 5.1
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/161484/Apache-MyFaces-2.x-Cross-Site-Request-Forgery.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Feb/66 Mailing ListThird Party Advisory
https://lists.apache.org/thread.html/r2b73e2356c6155e9ec78fdd8f72a4fac12f3e588014f5f535106ed9b%40%3Cannounce.apache.org% Mailing ListVendor Advisory
https://security.netapp.com/advisory/ntap-20210528-0007/ Third Party Advisory
http://packetstormsecurity.com/files/161484/Apache-MyFaces-2.x-Cross-Site-Request-Forgery.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Feb/66 Mailing ListThird Party Advisory
https://lists.apache.org/thread.html/r2b73e2356c6155e9ec78fdd8f72a4fac12f3e588014f5f535106ed9b%40%3Cannounce.apache.org% Mailing ListVendor Advisory
https://security.netapp.com/advisory/ntap-20210528-0007/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-26296), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.