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Advisory record · GHSA-cjpg-rgq5-fr37

Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux

CVSS 5.3 MediumEPSS 0.0019 · 8th percentile

Published by the GitHub Advisory Database at 9 Jun 2026, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.springframework:spring-webmvcMaven>=7.0.0, <7.0.8 || >=6.2.0, <6.2.19 || >=6.1.0, <=6.1.21 || <=5.3.397.0.8, 6.2.19
org.springframework:spring-webfluxMaven>=7.0.0, <7.0.8 || >=6.2.0, <6.2.19 || >=6.1.0, <=6.1.21 || <=5.3.397.0.8, 6.2.19
Identifiers
GHSA-cjpg-rgq5-fr37 · CVE-2026-41853
Weakness (CWE)
CWE-444
Tags
Published
9 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Spring Framework's spring-webmvc and spring-webflux packages are vulnerable to multipart request smuggling in affected versions. The source gives few details on attacker requirements and lists conflicting version ranges. Upgrade to 7.0.8 or 6.2.19; no fix is listed for 6.1.x or 5.3.x.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CNA (vmware)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.