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CVE-2026-41840· NVD / CVE Program· CNA vmware

Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests.

Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests. Affected versions: Spring Framework 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, 5.3.0 through 5.3.48.

MediumCVSS 5.9 · v3.1—No exploit Fix available

Noroxi analysis

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Published
Jun 9, 2026
Updated
Jul 23, 2026
EPSS
0.4% · 28th percentile
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Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · vmware
5.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
vmwarespring framework

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • vmware spring framework5.3.0 and later · before 5.3.49
  • vmware spring framework6.1.0 and later · before 6.1.28
  • vmware spring framework6.2.0 and later · before 6.2.18.1
  • vmware spring framework7.0.0 and later · before 7.0.7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (vmware). Independent of NVD's CPE analysis and usually ahead of it.

  • Spring Spring Framework

    • 7.0.0 and later · before 7.0.7.1affected
    • 6.2.0 and later · before 6.2.18.1affected
    • 6.1.0 and later · before 6.1.28affected
    • 5.3.0 and later · before 5.3.49affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libspring-javaall versions—
Mavenorg.springframework:spring-webfluxfrom 6.1.0 · up to and including 6.1.21—
Mavenorg.springframework:spring-webfluxfrom 6.2.0 · before 6.2.196.2.19
Mavenorg.springframework:spring-webfluxfrom 7.0.0 · before 7.0.87.0.8
Mavenorg.springframework:spring-webfluxup to and including 5.3.39—

Same product

vmware: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-22965A Spring MVC or Spring WebFlux application running on JDK 9+ may be vulnerable to remote code execution (RCE) via data binding.KEV
    99Now
  • CVE-2018-1270Spring Framework, versions 5.0 prior to 5.0.5 and versions 4.3 prior to 4.3.15 and older unsupported versions, allow applications to expose
    62This week
  • CVE-2020-5398RFD Attack via "Content-Disposition" Header Sourced from Request Input by Spring MVC or Spring WebFlux Application
    57Plan
  • CVE-2018-1275Spring Framework, versions 5.0 prior to 5.0.5 and versions 4.3 prior to 4.3.16 and older unsupported versions, allow applications to expose
    56Plan
  • CVE-2016-1000027Pivotal Spring Framework through 5.3.16 suffers from a potential remote code execution (RCE) issue if used for Java deserialization of untru
    49Plan
  • CVE-2026-59313Server Sent Event stream corruption in Spring MVC functional web framework
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.springframework:spring-webflux6.2.19Package registry (OSV)
Maven:org.springframework:spring-webflux7.0.8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4788879 days apartSpring Framework Memory Leak via SETUP Frame in RSocketMessageHandler
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records