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01 Record

CVE-2026-118669

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

HighPUBLISHEDCNA: GitHub_M
CNA base score8.4 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N
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02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
8.4 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Received. NVD last modified this record on 2026-10-28.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-28 21:09Z12 HR AGO
Last updated
2026-10-28 21:09Z12 HR AGO
Reserved
2026-10-28
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 8.4)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N
Weaknesses
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
00a2f7f365d374bb675ec96efca76eb70fe40230ed114f8b2634b791874f26d3

05 Affected products

VendorProductVersionsPlatforms
oauthliboauthlib< 4.0.0—

06 References