CVE-2026-126775: CSRF (CVSS 4.2)

Description

Social-auth-core 4.7.0 before 7.0.0 contains a login cross-site request forgery vulnerability in the SAML backend that restores sessions named in the unsigned RelayState parameter. Attackers can deliver their own valid IdP response and RelayState to a victim's browser via an auto-submitting form, signing the victim into the attacker's account to capture entered data.

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CVSS v3.1 Score

4.2

MEDIUM

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

EPSS — Exploit Prediction

0.0014

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-352 Cross-Site Request Forgery

References

Other References

https://github.com/python-social-auth/social-core/commit/7d9da571fc9ce8bd0003ccfcbfa8ed98c18bb640 https://github.com/python-social-auth/social-core/pull/2167 https://github.com/python-social-auth/social-core/releases/tag/7.0.0 https://github.com/python-social-auth/social-core/security/advisories/GHSA-4pv2-52v7-vrfx https://www.vulncheck.com/advisories/social-auth-core-4.7.0-before-7.0.0-login-csrf-via-saml-relaystate

Frequently Asked Questions

What is CVE-2026-126775? +

Social-auth-core 4.7.0 before 7.0.0 contains a login cross-site request forgery vulnerability in the SAML backend that restores sessions named in the unsigned RelayState parameter. Attackers can deliver their own valid IdP response and RelayState to a victim's browser via an auto-submitting form, signing the victim into the attacker's account to capture entered data. It has a CVSS v3.1 base score of 4.2 (MEDIUM).

How severe is CVE-2026-126775? +

CVE-2026-126775 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0014, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-126775? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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