CVE-2026-33242 json
Salvo has a Path Traversal in salvo-proxy::encode_url_path allows API Gateway Bypass
published 2026-03-19 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14640 , GHSA-f842-phm9-p4v4
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
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.
Patch / fix
- crates.io salvo 0.89.3
- salvo salvo 0.89.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | salvo | >=0.39.0, <0.89.3 |
0.89.3 |
Affected products
- salvo-rs salvo
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/salvo-rs/salvo/commit/7bac30e6960355c58e358e402072d4a3e5c4e1bb#diff-e319bf7afcb577f7e9f4fb767005072f6335d23f3
web, patch
-
github.com
/salvo-rs/salvo/security/advisories/GHSA-f842-phm9-p4v4
exploit, web, mitigation, vendor-advisory
-
github.com
/salvo-rs/salvo/releases/tag/v0.89.3
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-33242
advisory
-
github.com
/salvo-rs/salvo
package
Sources
- CVE List CVE-2026-33242
- GitHub Advisory GHSA-f842-phm9-p4v4
- NVD CVE-2026-33242
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.