Vulnerability · Published Mar 23, 2026 · Assigned by GitHub_M

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

High 8.7

In plain English

A high-severity resource allocation without limits in salvo from salvo-rs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.4%top 61.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
salvo-rs	salvo	< 0.89.3

Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

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