Cross-site scripting in oauthlib - CVE-2026-49264

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Main Vulnerability Database Vulnerabilities #VU152411

Cross-site scripting in oauthlib - CVE-2026-49264

Published: September 28, 2026


Vulnerability identifier: #VU152411
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-49264
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary JavaScript in a client application's origin.

The vulnerability exists due to improper neutralization of input during web page generation in the RevocationEndpoint when processing JSONP revocation requests with attacker-controlled callback parameters. A remote attacker can supply a crafted callback parameter to execute arbitrary JavaScript in a client application's origin.

The JSONP feature is disabled by default and exploitation requires a browser page to load the response as JSONP.


Affected software

oauthlib
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Micro
Public Cloud Module
Python 3 Module
Basesystem Module
openSUSE Leap
openEuler
python3-oauthlib
python2-oauthlib
python-oauthlib
python-oauthlib-help
python311-oauthlib

How to mitigate CVE-2026-49264

Install security update from vendor's website.

oauthlib - update to 3.3.2
python3-oauthlib - update to 2.0.6-150000.3.9.1
python2-oauthlib - update to 2.0.6-150000.3.9.1
python-oauthlib - addressed in versions 3.1.1-5, 3.2.2-3
python3-oauthlib - addressed in versions 3.1.1-5, 3.2.2-3
python-oauthlib-help - update to 3.2.2-3
python311-oauthlib - addressed in versions 3.2.2-150400.12.10.1, 3.2.2-159998.1.1

External References

Related Security Bulletins