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TI-2026-25660 Aliases CVE-2026-33242GHSA-f842-phm9-p4v4

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

Priority HIGH 72CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00575 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed salvo (salvo-rs): 0.89.3salvo (crates.io): 0.89.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
salvo-rssalvo0.39.0 to before 0.89.30.89.3Patch availableCNA
—salvo (crates.io)0.39.0 to before 0.89.30.89.3Patch availableGHSA-f842-phm9-p4v4
  • salvo Vendorsalvo-rs Affected 0.39.0 to before 0.89.3 Fixed in 0.89.3 Patch available CNA
  • salvo (crates.io) Vendor— Affected 0.39.0 to before 0.89.3 Fixed in 0.89.3 Patch available GHSA-f842-phm9-p4v4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:salvo:salvo:*:*:*:*:*:rust:*:*0.39.0 to before 0.89.3Vulnerablesalvo-rs
  • cpe:2.3:a:salvo:salvo:*:*:*:*:*:rust:*:* Versions 0.39.0 to before 0.89.3 Vulnerable ·salvo-rs

Remediation

  • Fix · CNA salvo (salvo-rs) Fixed in 0.89.3
  • Fix · GHSA-f842-phm9-p4v4 salvo (crates.io) Fixed in 0.89.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33242
  2. 2026-10-03 Alias added: GHSA-f842-phm9-p4v4

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-25659 Salvo Affected by Denial of Service via Unbounded Memory Allocation in Form Data Parsing CVSS 4.0HIGH 8.7
  • TI-2026-17867 Salvo is vulnerable to stored XSS in the list_html function by uploading files with malicious names CVSS 3.1HIGH 8.8
  • TI-2026-17866 Salvo is vulnerable to reflected XSS in the list_html function CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences