CVE-2026-33242: Salvo is a Rust web framework

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HIGH 7.5REMOTEUPGRADE

CVE-2026-33242 is a high-severity flaw (CVSS 7.5) affecting salvo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 inadver

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: salvo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 00:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

salvo salvo UPGRADE

Affected: >= 0.39.0 and < 0.89.3

Fixed in: 0.89.3

Safe to downgrade to: a release before 0.39.0

1. Check installed version

apt-cache policy salvo || rpm -q salvo || salvo --version

2. UPGRADE to 0.89.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade salvo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade salvo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.39.0 (Debian / Ubuntu)

apt-cache madison salvo sudo apt install salvo=<VERSION_BEFORE_0.39.0> sudo apt-mark hold salvo

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list salvo sudo dnf downgrade salvo-<VERSION_BEFORE_0.39.0> sudo dnf versionlock add salvo

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33242?

salvo: upgrade to 0.89.3. Exact commands for each OS are on this page.

Is CVE-2026-33242 being exploited?

CVE-2026-33242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33242 affect?

CVE-2026-33242 affects salvo. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-33242?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-33241 HIGH 7.5 UPGRADE Salvo is a Rust web framework

References

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