GHSA-cq55-c7wv-pxmq
Suggest an improvement- Source
- https://github.com/advisories/GHSA-cq55-c7wv-pxmq
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-cq55-c7wv-pxmq/GHSA-cq55-c7wv-pxmq.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-cq55-c7wv-pxmq
- Aliases
- Published
- 2026-09-01T16:38:22Z
- Modified
- 2026-09-01T16:45:03Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N CVSS Calculator
- Summary
- Smarty: SSRF via redirect bypass of trusted_uri using {fetch}
- Details
-
When a Security policy is active, {fetch} validates the requested remote URL against the trusted_uri allowlist via Security::isTrustedUri(). For non-http:// schemes (e.g. https://) the resource was then read with file_get_contents(), which follows HTTP redirects by default. Because isTrustedUri() only validates the initial URL, an open redirect on an otherwise-trusted host could be used to redirect the request to a non-trusted, internal target — bypassing the trusted_uri policy.
Impact
An attacker who can supply a fetch target (or influence one) and who has an open redirect available on a trusted host can cause the server to issue requests to attacker-chosen internal endpoints, defeating the trusted_uri allowlist (server-side request forgery).
Patches
Fixed in 5.8.2. When a security policy is active, {fetch} now passes a stream context that disables redirect following (follow_location => 0, max_redirects => 1) to file_get_contents() for remote resources. Behavior is unchanged when no security policy is set, since there is no trusted_uri to bypass.
Workarounds
Avoid fetching remote resources from within templates under untrusted control; ensure hosts listed in trusted_uri do not expose open redirects.
- Database specific
{ "cwe_ids": [ "CWE-918" ], "github_reviewed": true, "github_reviewed_at": "2026-09-01T16:38:22Z", "nvd_published_at": "2026-08-31T21:17:33Z", "severity": "MODERATE" }- References
-
- https://github.com/smarty-php/smarty/security/advisories/GHSA-cq55-c7wv-pxmq
- https://nvd.nist.gov/vuln/detail/CVE-2026-62993
- https://github.com/smarty-php/smarty/pull/1194
- https://github.com/smarty-php/smarty/commit/31e06fc087a8b5a9b236c1e5dacc1c2850a2c115
- https://github.com/smarty-php/smarty/commit/a1ccdb0518021a559b4066c37b76a42c86bbce90
- https://github.com/smarty-php/smarty
- https://github.com/smarty-php/smarty/releases/tag/v4.5.7
- https://github.com/smarty-php/smarty/releases/tag/v5.8.2
Affected packages
Packagist / smarty/smarty
Package
- Name
- smarty/smarty
- Purl
- pkg:composer/smarty/smarty
Packagist / smarty/smarty
Package
- Name
- smarty/smarty
- Purl
- pkg:composer/smarty/smarty
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed4.5.7