Path Traversal in Salvo
CVE-2026-33242
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.
Vulnerability class: Path Traversal (Directory Traversal)
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: 0.006 (44.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000
Affected products
- Salvo
- Salvo-Rs Salvo — versions >= 0.39.0, < 0.89.3
Weakness classification (CWE)
References
- github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4 (Exploit, Mitigation, Vendor Advisory)
- github.com/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb (Patch)
- github.com/salvo-rs/salvo/releases/tag/v0.89.3 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-33242?
- CVE-2026-33242 is a high-severity vulnerability in Salvo, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-03-24.
- How severe is CVE-2026-33242?
- High severity. CVSS v3 base score is 7.5 out of 10.