CVE-2026-56309
MEDIUMCapgo - Plan Bypass via Unrestricted Attachment Upload Endpoint
Title source: cnaDescription
Capgo before 12.128.2 fails to enforce plan/quota restrictions on the /files/upload/attachments endpoint, allowing plan-blocked apps to create publicly readable R2 objects. Attackers can upload arbitrary attachments using upload-scoped API keys that bypass plan checks, persist outside normal bundle metadata, and survive app deletion, enabling storage and bandwidth abuse.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-q52j-ggvx-cr4v)
https://github.com/Cap-go/capgo/security/advisories/GHSA-q52j-ggvx-cr4v
Third Party Advisory third-party-advisory
VulnCheck Advisory: Capgo - Plan Bypass via Unrestricted Attachment Upload Endpoint
https://www.vulncheck.com/advisories/capgo-plan-bypass-via-unrestricted-attachment-upload-endpoint
Scores
CVSS v3
5.4
EPSS
0.0026
EPSS Percentile
17.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (2)
Capgo/Capgo
< 12.128.2
Capgo/Capgo
12.128.2
Published
Jul 10, 2026
Tracked Since
Jul 10, 2026