PT-2026-57171 · Cap Go · Cap-Go

Judel777 · Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-56309

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

Exploit

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-56309

Affected Products

Cap-Go

References · 3

• 🔥 https://github.com/Cap-go/capgo/security/advisories/GHSA-q52j-ggvx-cr4v · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-56309 · Security Note
• https://vulncheck.com/advisories/capgo-plan-bypass-via-unrestricted-attachment-upload-endpoint · Note