CVE-2026-114618

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Source
https://cve.org/CVERecord?id=CVE-2026-114618
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114618.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-114618
Aliases
  • GHSA-fch4-3c6x-j4gc
Published
2026-10-22T21:28:37Z
Modified
2026-10-23T10:45:21Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Authlib: Default JWT bearer grant accepts assertions for the wrong audience
Details

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, the default RFC 7523 JWTBearerGrant.get_audiences() returns an empty list, causing JWTBearerGrant.verify_claims() to require only that an aud claim exists without matching the current authorization server. An attacker holding a legitimate assertion for another service can present it to a server that shares the signing key and uses the default grant, obtaining an access token across a trust boundary. Implementations that override get_audiences() with the server's valid audience identifiers are not affected. This issue is fixed in version 1.9.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-1188",
        "CWE-287"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114618.json"
}
References

Affected packages

Git / github.com/authlib/authlib

Affected ranges

Type
GIT
Repo
https://github.com/authlib/authlib
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e8d50bd7dc442fde1364291df9c429d1da91c0cb
Fixed
e3bd41cb29dcfee434453b135ffb487884baeedf
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "1.9.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "e3bd41cb29dcfee434453b135ffb487884baeedf"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v1.9.0",
            "range":  [
                {
                    "fixed":  "e8d50bd7dc442fde1364291df9c429d1da91c0cb"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

1.*
1.7.1
v0.*
v0.1
v0.10
v0.11
v0.12
v0.13
v0.14
v0.14.1
v0.14.2
v0.14.3
v0.15
v0.2
v0.2.1
v0.3
v0.4
v0.4.1
v0.5
v0.5.1
v0.6
v0.7
v0.8
v0.9
v1.*
v1.0.0
v1.0.1
v1.1.0
v1.2.0
v1.2.1
v1.3.0
v1.3.2
v1.4.0
v1.4.1
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.7.0
v1.7.1
v1.7.2
v1.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114618.json"