CVE-2026-121560
LogChimp 0.9.0-alpha.1 before 0.9.3 contains an authorization bypass vulnerability that allows…
- Risk score
- 43/100
- CVSS
- 7.1 v3.1
- Published
- 3 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- LogChimp 0.9.0-alpha.1 before 0.9.3 contains an authorization bypass vulnerability that allows authenticated post authors to modify any other post by supplying mismatched postId and id body parameters. Attackers can set postId to their own post and id to an enumerated victim post UUID to overwrite its title, slug, con…
- Affected
- See advisory
- Fix
- Upgrade the product to 0.9.3 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.1 high
References
- https://github.com/logchimp/logchimp
- https://github.com/logchimp/logchimp/blob/v0.9.2/packages/server/src/controllers/post/updatePost.ts#L67
- https://github.com/logchimp/logchimp/blob/v0.9.2/packages/server/src/middlewares/postExists.ts#L72-L77
- https://github.com/logchimp/logchimp/commit/a78b69af342908472ad400285187e43729295a7c
- https://github.com/logchimp/logchimp/releases/tag/v0.9.3
- https://www.vulncheck.com/advisories/logchimp-before-0.9.3-authorization-bypass-via-patch-api-v1-posts
Original description
LogChimp 0.9.0-alpha.1 before 0.9.3 contains an authorization bypass vulnerability that allows authenticated post authors to modify any other post by supplying mismatched postId and id body parameters. Attackers can set postId to their own post and id to an enumerated victim post UUID to overwrite its title, slug, content, boardId and roadmap_id.
Last activity 3 Nov 2026. Patch Forecast updates every hour.