SSRF in Saloon
CVE-2026-33182
Saloon is a PHP library that gives users tools to build API integrations and SDKs. Prior to version 4.0.0, when building the request URL, Saloon combined the connector's base URL with the request endpoint. If the endpoint was a valid absolute URL, the code used that URL as-is and ignored the base URL. The request—and any authentication headers, cookies, or tokens attached by the connector—was then sent to the attacker-controlled host. If the endpoint could be influenced by user input or configuration (e.g. redirect_uri, callback URL), this allowed server-side request forgery (SSRF) and/or credential leakage to a third-party host. The fix in version 4.0.0 is to reject absolute URLs in the endpoint: URLHelper::join() throws InvalidArgumentException when the endpoint is a valid absolute URL, unless explicitly allowed, requiring callers to opt-in to the functionality on a per-connector or per-request basis.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Saloon
- Saloonphp Saloon — versions < 4.0.0
Weakness classification (CWE)
References
- github.com/saloonphp/saloon/security/advisories/GHSA-c83f-3xp6-hfcp (Vendor Advisory)
- docs.saloon.dev/upgrade/upgrading-from-v3-to-v4 (Release Notes)
Frequently asked questions
- What is CVE-2026-33182?
- CVE-2026-33182 is a high-severity vulnerability in Saloon, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2026-03-26.
- How severe is CVE-2026-33182?
- High severity. CVSS v3 base score is 7.5 out of 10.