https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-01T22:43:01.665916+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/cve-2026-91123 CVE-2026-91123 — Discourse: Reject literal backslash path separators in iframe src traversal guard 2026-10-01T22:43:01.675297+00:00

Affected: discourse

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the iframe src traversal guard did not treat literal backslashes as path separators after decoded dot segments. A crafted source could therefore pass an allowed_iframes subpath check while browser URL normalization moved the iframe outside the intended allowed path. The resulting iframe could load content from a location that the administrator did not allow. This issue is fixed in versions 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0.