CVE-2026-33242 Details
Description
Salvo is a Rust web framework. Versions 0.39.0 through 0.89.2 have a Path Traversal and Access Control Bypass vulnerability in the salvo-proxy component. The vulnerability allows an unauthenticated external attacker to bypass proxy routing constraints and access unintended backend paths (e.g., protected endpoints or administrative dashboards). This issue stems from the encode_url_path function, which fails to normalize "../" sequences and inadvertently forwards them verbatim to the upstream server by not re-encoding the "." character. Version 0.89.3 contains a patch.
A path traversal and access control bypass vulnerability has been identified in the salvo-proxy component of the Salvo web framework for Rust, affecting versions 0.39.0 through 0.89.2. This vulnerability allows unauthenticated external attackers to bypass proxy routing constraints and access unintended backend paths, such as protected endpoints or administrative dashboards. The issue arises from the encode_url_path function, which fails to properly normalize '../' sequences, forwarding them verbatim to the upstream server without re-encoding the '.' character. As a result, requests can be manipulated to access restricted areas of the application.
Users can upgrade to Salvo version 0.89.3, which includes a patch for this vulnerability. Instructions for downloading this version are available on the Salvo GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4 | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb#diff-e319bf7afcb577f7e9f4fb767005072f6335d23f306dd52e8c94f3d222610d02R20 | [email protected] | Patch |
| https://github.com/salvo-rs/salvo/releases/tag/v0.89.3 | [email protected] | ProductRelease Notes |
| https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| salvo salvo | >= 0.39.0, < 0.89.3 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | Initial Analysis | [email protected] |
| Mar 24, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | New CVE Received | [email protected] |