CVE catalog

CVE-2026-41847

Spring WebFlux applications may be vulnerable to a security bypass when using the Kotlin Router DSL. Affected versions: Spring Framework 5.3.0 through 5.3.48.

[CVE catalog]

Severity: Medium · CVSS 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Published: Jun 8, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.17% · Oct 25, 2026

Spring WebFlux applications may be vulnerable to a security bypass when using the Kotlin Router DSL. Affected versions: Spring Framework 5.3.0 through 5.3.48.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libspring-java	sid	`4.3.30-6`	vulnerable
Debian	libspring-java	forky	`4.3.30-6`	vulnerable
Debian	libspring-java	trixie	`4.3.30-3`	vulnerable
Debian	libspring-java	bookworm	`4.3.30-2`	vulnerable
Cpe	libspring-java	Not reported	Not reported	vulnerable
Cpe	spring_framework	Not reported	`5.3.49`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libspring-java	source	sid	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libspring-java	source	forky	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libspring-java	source	trixie	`(unfixed)`	unimportant	Not reported	Not reported
Debian	libspring-java	source	bookworm	`(unfixed)`	unimportant	Not reported	Not reported
Cpe	spring_framework	cpe	Not reported	`5.3.49`	Not reported	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libspring-aop-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-beans-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-context-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-context-support-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-core-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-expression-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-instrument-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-jdbc-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-jms-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-messaging-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-orm-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-oxm-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-test-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-transaction-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-web-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-web-portlet-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
[libspring-web-servlet-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12
- 4.3.30-2 · all · bookworm
  Affected
  nvd · libspring-java · debian · bookworm; nvd · libspring-java · debian · 12

[Debian 13 (Trixie)]

[libspring-aop-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13
[libspring-beans-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13
[libspring-context-java]Affected
Source package: [libspring-java]
Details (2)
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13
- 4.3.30-3 · all · trixie
  Affected
  nvd · libspring-java · debian · 13

Next results

Observed: Oct 23, 2026, 9:46:53 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]