CVE-2026-121560 (GCVE-0-2026-121560)
Vulnerability from cvelistv5 – Published: 2026-11-03 15:17 – Updated: 2026-11-03 16:42
VLAI
EPSS
VEX
Title
LogChimp before 0.9.3 Authorization Bypass via PATCH /api/v1/posts
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 16:42 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/logchimp/logchimp/commit/a78b6… | patch |
| https://github.com/logchimp/logchimp | product |
| https://github.com/logchimp/logchimp/blob/v0.9.2/… | technical-description |
| https://github.com/logchimp/logchimp/blob/v0.9.2/… | technical-description |
| https://github.com/logchimp/logchimp/releases/tag… | technical-descriptionrelease-notes |
| https://www.vulncheck.com/advisories/logchimp-bef… | third-party-advisory |
Impacted products
Date Public
2026-11-02 00:00
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Sightings
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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