CVE-2026-56233
HIGH
8.3
CVSS 3.1
Description
Capgo before 12.128.2 contains a path traversal vulnerability in the builder upload proxy that allows authenticated users with build permissions to bypass upload restrictions. Attackers can append traversal sequences to the upload path, which are normalized by the WHATWG URL parser, enabling access to internal administrative endpoints with the privileged BUILDER_API_KEY header and resulting in server-side privilege escalation.
Metadata
Severity & Metrics
8.3
HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Capgo | Capgo | — | 0 < 12.128.2, 12.128.2 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-22 | cna | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 8.7 | HIGH | 4.0 | cna | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N |
| 8.3 | HIGH | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
References (2)
- GitHub Security Advisory (GHSA-qprp-873h-mx6f) https://github.com/Cap-go/capgo/security/advisories/GHSA-qprp-873h-mx6f
- VulnCheck Advisory: Capgo - SSRF and Privilege Escalation via Path Traversal in Builder Upload Proxy https://www.vulncheck.com/advisories/capgo-ssrf-and-privilege-escalation-via-path-traversal-in-builder-upload-proxy