What’s Vulnerable › Vulnerabilities

CVE-2026-33242: Salvo has a Path Traversal in salvo-proxy::encode_url_path allows API Gateway Bypass

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-24 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• salvo-rs salvo: from 0.39.0 before 0.89.3 — fixed in 0.89.3

How to fix

Upgrade to a fixed version: salvo-rs salvo 0.89.3. Check the vendor advisory for mitigations.

References

• https://github.com/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb#diff-e319bf7afcb577f7e9f4fb767005072f6335d23f306dd52e8c94f3d222610d02R20
• https://github.com/salvo-rs/salvo/releases/tag/v0.89.3
• https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4
• https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4

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