Vulnerability · Published Oct 5, 2026 · Assigned by redhat

CVE-2026-102295Quay: quay: dom-based cross-site scripting via oauth local callback format=json parameter

Medium 5.4

In plain English

A medium-severity cross-site scripting in Red Hat Quay 3 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 86.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A flaw was found in Quay. A cross-site scripting (XSS) vulnerability in the OAuth callback handler allows a remote attacker to execute arbitrary JavaScript code within a user's browser session. By tricking a logged-in user into visiting a specially crafted link, an attacker can exploit improper input sanitization to run client-side scripts in the application context. Successful exploitation could allow the attacker to compromise the user's session, access sensitive registry information, or perform unauthorized actions on their behalf.

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat Quay 3	see references

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

https://access.redhat.com/security/cve/CVE-2026-102295 vdb-entry, x_refsource_REDHAT
RHBZ#2542699 issue-tracking, x_refsource_REDHAT