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CVE-2026-49264 is a cross-site scripting vulnerability in oauthlib's RevocationEndpoint. When JSONP is enabled, the endpoint reflects an unvalidated JSONP callback parameter, permitting generation of attacker-controlled JavaScript.
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No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A JSONP callback-injection vulnerability in oauthlib's OAuth 2.0 RevocationEndpoint. Deployments that explicitly enable JSONP can reflect attacker-controlled callback values into responses, enabling arbitrary JavaScript execution in the origin of a client page that consumes the endpoint as trusted JSONP.
A medium-severity cross-site scripting vulnerability (CWE-79) in the oauthlib library and related packages. It has a CVSS v3.0 base score of 6.1 and requires user interaction.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.