jwt-2.0.1.jar: 1 vulnerabilities (highest severity is: 7.5)

[mend-for-github-com]

Vulnerable Library - jwt-2.0.1.jar

Path to dependency file: /build.gradle

Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.18.3/78f80c259268200e588aa204dd97ecf09b76916e/jackson-core-2.18.3.jar

Found in HEAD commit: 431499094d23a84b9187ef24b569995ee58d0c42

Vulnerabilities

Vulnerability	Severity	CVSS	Exploit Maturity	EPSS	Dependency	Type	Fixed in (jwt version)	Remediation Possible**	Reachability
WS-2026-0003	High	7.5	Not Defined		jackson-core-2.18.3.jar	Transitive	N/A*	❌

*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

Details

WS-2026-0003

Vulnerable Library - jackson-core-2.18.3.jar

Core Jackson processing abstractions (aka Streaming API), implementation for JSON

Library home page: https://github.com/FasterXML/jackson-core

Path to dependency file: /build.gradle

Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.18.3/78f80c259268200e588aa204dd97ecf09b76916e/jackson-core-2.18.3.jar

Dependency Hierarchy:

• jwt-2.0.1.jar (Root Library)
  • ❌ jackson-core-2.18.3.jar (Vulnerable Library)

Found in HEAD commit: 431499094d23a84b9187ef24b569995ee58d0c42

Found in base branch: main

Vulnerability Details

The non-blocking (async) JSON parser in jackson-core bypasses the maxNumberLength constraint (default: 1000 characters) defined in StreamReadConstraints. This allows an attacker to send JSON with arbitrarily long numbers through the async parser API, leading to excessive memory allocation and potential CPU exhaustion, resulting in a Denial of Service (DoS).

The standard synchronous parser correctly enforces this limit, but the async parser fails to do so, creating an inconsistent enforcement policy.

Publish Date: 2026-03-02

URL: WS-2026-0003

Threat Assessment

Exploit Maturity: Not Defined

EPSS:

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-72hv-8253-57qq

Release Date: 2026-03-02

Fix Resolution: com.fasterxml.jackson.core:jackson-core:2.18.6,https://github.com/FasterXML/jackson-core.git - jackson-core-2.21.1,https://github.com/FasterXML/jackson-core.git - jackson-core-2.18.6,tools.jackson.core:jackson-core:3.1.0,https://github.com/FasterXML/jackson-core.git - jackson-core-3.1.0