Read the docs
TI-2026-80499 Aliases CVE-2026-115910GHSA-h2r5-x5m7-3935

OpenID Connect nonce not bound to session in Python Social Auth

Priority HIGH 65CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Security bypass, Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-345 and CWE-384.

Summary

Python Social Auth social-core before 6.2.0 and social-auth-core before 6.2.0 are affected. The OpenID Connect nonce is stored in a shared table and checked only for existence and expiry, not bound to the browser session or OAuth state (CWE-345). An attacker who obtains a victim's unused authorization code can log in as the victim when DEFAULT_USE_PKCE is disabled, as it is in the default OpenIdConnectAuth configuration.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

Python Social Auth is a social authentication and registration mechanism. Prior to 6.2.0, OpenIdConnectAuth in social_core/backends/open_id_connect.py uses get_and_store_nonce to place the OpenID Connect nonce in a shared OpenIdConnectAssociation table, and get_nonce and validate_claims verify only that the nonce exists and has not expired rather than binding it to the browser session and OAuth state that initiated the login. An attacker who obtains a victim's unused authorization code can start a separate login to obtain valid state for the attacker's browser, submit the victim's code with that state, and pass nonce validation because the victim nonce is globally available. With DEFAULT_USE_PKCE disabled in the default OpenIdConnectAuth configuration, the attacker can be logged in as the victim. This issue is fixed in version 6.2.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00157 4th percentileScored 2026-11-07
Fix Partial social-core (python-social-auth): 6.2.0social-auth-core (PyPI): 6.2.0Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
python-social-authsocial-corebefore 6.2.06.2.0Patch availableCNA
—social-auth-core (PyPI)before 6.2.06.2.0Patch availableGHSA-h2r5-x5m7-3935
  • social-core Vendorpython-social-auth Affected before 6.2.0 Fixed in 6.2.0 Patch available CNA
  • social-auth-core (PyPI) Vendor— Affected before 6.2.0 Fixed in 6.2.0 Patch available GHSA-h2r5-x5m7-3935

Remediation

Upgrade social-auth-core to 6.2.0, which fixes this issue. The sources list no fixed version for social-core. Red Hat lists Ansible Automation Platform 2 as affected with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

  • Fix · CNA social-core (python-social-auth) Fixed in 6.2.0
  • Fix · GHSA-h2r5-x5m7-3935 social-auth-core (PyPI) Fixed in 6.2.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-115910
  2. 2026-10-27 Affected versions changed · Red Hat
  3. 2026-10-27 CVSS score added · Red Hat
  4. 2026-10-27 Priority changed: MEDIUM → LOW
  5. 2026-10-28 Alias added: GHSA-h2r5-x5m7-3935
  6. 2026-10-28 Fix available: PyPI/[email protected] · GHSA-h2r5-x5m7-3935
  7. 2026-10-28 CVSS score added · GHSA-h2r5-x5m7-3935
  8. 2026-10-28 Weakness changed · GHSA-h2r5-x5m7-3935
  9. 2026-10-28 6 new references · GHSA-h2r5-x5m7-3935
  10. 2026-10-31 CISA SSVC decision points changed
  11. 2026-10-31 Priority changed: LOW → HIGH

References

Advisory 1

Other 5

  • TI-2025-38176 Python Social Auth - Django has unsafe account association CVSS 4.0MEDIUM 6.3
  • TI-2026-41144 social-auth-core: VK App backend accepts unsigned callback data when auth_key is missing CVSS 3.1HIGH 7.4
  • TI-2026-41142 social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend CVSS 3.1MEDIUM 6.8
  • TI-2026-41141 social-auth-core has an Improper Authentication issue CVSS 3.1MEDIUM 6.4
  • TI-2026-74654 Login CSRF in Python Social Auth LINE backend CVSS 3.1MEDIUM 6.5
  • TI-2024-21751 social-auth-app-django Improper Handling of Case Sensitivity vulnerability CVSS 3.1MEDIUM 4.9
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences