DEBIAN-CVE-2026-114617

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Source
https://security-tracker.debian.org/tracker/CVE-2026-114617
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114617.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-114617
Upstream
Published
2026-10-22T22:18:04Z
Modified
2026-10-31T10:00:44Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parse_id_token() reads the nonce_supported decision from the untrusted ID token being validated and sets the expected nonce to null when that claim is the JSON boolean false. In implicit and hybrid relying parties, or applications that directly accept externally supplied ID tokens, an attacker with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token into an attacker-controlled session. Plain authorization code flow is not affected, and the token must still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported in both authlib/integrations/base_client/sync_openid.py and authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in version 1.9.0.

References

Affected packages

Debian:12 / python-authlib

Package

Name
python-authlib
Purl
pkg:deb/debian/python-authlib?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.0-1
1.2.0-1+deb12u1
1.2.0-1+deb12u2
1.2.1-1
1.3.0-1
1.3.0-2
1.3.0-3
1.3.1-1
1.3.2-1
1.3.2-2
1.4.0-1
1.4.1-1
1.5.0-1
1.5.1-1
1.5.2-1
1.6.0-1
1.6.1-1
1.6.3-1
1.6.4-1
1.6.5-1
1.6.6-1
1.6.7-1
1.6.8-1
1.6.9-1
1.7.0-1
1.7.2-1
1.7.2-2
1.9.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114617.json"

Debian:13 / python-authlib

Package

Name
python-authlib
Purl
pkg:deb/debian/python-authlib?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.6.0-1
1.6.0-1+deb13u1
1.6.1-1
1.6.3-1
1.6.4-1
1.6.5-1
1.6.6-1
1.6.7-1
1.6.8-1
1.6.9-1
1.7.0-1
1.7.2-1
1.7.2-2
1.9.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114617.json"

Debian:14 / python-authlib

Package

Name
python-authlib
Purl
pkg:deb/debian/python-authlib?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.9.1-1

Affected versions

1.*
1.6.0-1
1.6.1-1
1.6.3-1
1.6.4-1
1.6.5-1
1.6.6-1
1.6.7-1
1.6.8-1
1.6.9-1
1.7.0-1
1.7.2-1
1.7.2-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114617.json"