CVE-2026-56772

Description

NewsBlur before 14.5.0 contains a broken access control vulnerability that allows authenticated users to read private notification feeds by supplying arbitrary user_id values to the GET /social/interactions endpoint without ownership verification. Attackers can enumerate user_id values to access another user's follows, replies, and social activity without authorization.

References

• https://github.com/samuelclay/NewsBlur/commit/613c60b67cc46b3f4cae1dc2dfd8d717a39bc483
• https://github.com/samuelclay/NewsBlur/releases/tag/Android_14.5.0
• https://www.vulncheck.com/advisories/newsblur-insecure-direct-object-reference-in-social-interactions-endpoint