What’s Vulnerable › Vulnerabilities

CVE-2019-19324

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-20 · updated 2026-06-17
• Weakness: CWE-670

Description

Xmidt cjwt through 1.0.1 before 2019-11-25 maps unsupported algorithms to alg=none, which sometimes leads to untrusted accidental JWT acceptance.

Affected products

• Xmidt Cjwt: from 1.0.1 before 2019-11-25 — fixed in 2019-11-25

How to fix

Upgrade to a fixed version: Xmidt Cjwt 2019-11-25. Check the vendor advisory for mitigations.

References

• https://github.com/xmidt-org/cjwt/commit/9304d3e94242c1a6df77b21bde0e949392e1040a
• https://github.com/xmidt-org/cjwt/pull/29#issuecomment-558356866
• https://github.com/xmidt-org/cjwt/commit/9304d3e94242c1a6df77b21bde0e949392e1040a
• https://github.com/xmidt-org/cjwt/pull/29#issuecomment-558356866

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