What’s Vulnerable › Vulnerabilities

CVE-2026-33241: Salvo Affected by Denial of Service via Unbounded Memory Allocation in Form Data Parsing

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-24 · updated 2026-06-17
• Weakness: CWE-770

Description

Salvo is a Rust web framework. Prior to version 0.89.3, Salvo's form data parsing implementations (`form_data()` method and `Extractible` macro) do not enforce payload size limits before reading request bodies into memory. This allows attackers to cause Out-of-Memory (OOM) conditions by sending extremely large payloads, leading to service crashes and denial of service. Version 0.89.3 contains a patch.

Affected products

• salvo-rs salvo: 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/releases/tag/v0.89.3
• https://github.com/salvo-rs/salvo/security/advisories/GHSA-pp9r-xg4c-8j4x

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