What is CVE-2026-118669?

CVE-2026-118669 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client

Which CVE IDs does CVE-2026-118669 cover?

CVE-2026-118669 covers the following CVE IDs: CVE-2026-118669. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-118669?

CVE-2026-118669 affects 2 products, including: azl3 python-oauthlib 3.2.2-3 on Azure Linux 3.0; azl3 python-oauthlib 3.2.2-4 on Azure Linux 3.0.

CVE-2026-118669High

OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client

Vendor

Microsoft Security Response Center (MSRC)

Published

October 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-118669 →

🎯 Affected products2

azl3 python-oauthlib 3.2.2-3 on Azure Linux 3.0
azl3 python-oauthlib 3.2.2-4 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118669
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade