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VulnerabilityPublished Updated

CVE-2026-57175: python-social-auth social-core · Improper Authentication

Affects python-social-auth social-coreSource CVE Database V5

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Not known to be exploited · CVSS 6.4 Medium : upgrade to 5.0.0 when convenient.

Data as of 6 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.0.0
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade python-social-auth social-core to 5.0.0.

Affected software

ProductAffectedFixed in
python-social-authsocial-coreAffected
  • <5.0.0
Fixed in
  • 5.0.0
PyPIsocial-corepkg:pypi/social-coreOther threatsAffected
  • <5.0.0
Fixed in
  • 5.0.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade python-social-auth social-core to version 5.0.0 or later, where the vulnerability is fixed by validating SAML responses against stored AuthnRequest IDs. No other mitigations are indicated by the vendor advisory.

Description

CVE-2026-57175 is an improper authentication vulnerability in python-social-auth's social-core SAML backend prior to version 5.0.0. The flaw allows acceptance of SAML responses without verifying they match a previously issued AuthnRequest. This can enable an attacker with a valid identity on a trusted Identity Provider (IdP) to link their SAML identity to a victim's local account and gain unauthorized access. The issue affects applications using the SAML backend with authenticated account association and was fixed in version 5.0.0 by validating SAML responses against stored AuthnRequest IDs.

References

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