CVE-2026-91123

01/תיאור (מקור, אנגלית)

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.

02/קישורים6

• github.com/discourse/discourse/commit/042d7b159beda4f74d23e245‮…
• github.com/discourse/discourse/commit/097ce5600a2d74d9c68e5797‮…
• github.com/discourse/discourse/commit/0b5a27e689925edce9ba9b14‮…
• github.com/discourse/discourse/commit/142f5155ad8e56ddb8012c4e‮…
• github.com/discourse/discourse/pull/42882
• github.com/discourse/discourse/security/advisories/GHSA-6pwj-w‮…