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VulnerabilityPublished Updated

CVE-2026-57178: 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 7.4 High : upgrade to 5.0.0 soon.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 5% 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:N/UI:N/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 8 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 enforcing the presence and validity of the auth_key parameter before trusting VK callback data. Applications using the vk-app backend should not accept callback data without proper signature verification. No other mitigations are indicated.

Description

Python Social Auth's social-core component prior to version 5.0.0 contains an improper authentication vulnerability in the vk-app backend. The backend accepted VK application callback data without verifying the callback signature if the auth_key parameter was missing. This allowed attackers to impersonate arbitrary VK user identities by manipulating callback fields. The issue is fixed in version 5.0.0 by enforcing the presence and validity of auth_key before trusting callback data.

References

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