What’s Vulnerable › Vulnerabilities

CVE-2021-29063

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-21 · updated 2026-06-17
• Weakness: CWE-770

Description

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Mpmath v1.0.0 through v1.2.1 when the mpmathify function is called.

Affected products

• Fedoraproject Fedora: 33, 34, 35
• Mpmath: from 1.0.0 through 1.2.1

References

• https://github.com/fredrik-johansson/mpmath/commit/46d44c3c8f3244017fe1eb102d564eb4ab8ef750
• https://github.com/mpmath/mpmath/releases/tag/1.3.0
• https://github.com/npm/hosted-git-info/pull/76
• https://github.com/yetingli/PoCs/blob/main/CVE-2021-29063/Mpmath.md
• https://github.com/yetingli/SaveResults/blob/main/js/hosted-git-info.js
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3M5O55E7VUDMXCPQR6MQTOIFDKHP36AA/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIUX3XWY2K3MSO7QXMZXQQYAURARSPC5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS2U6GLXQSRZJE2HVUAUMVFR2DWQLCZG/
• https://www.npmjs.com/package/hosted-git-info
• https://github.com/fredrik-johansson/mpmath/commit/46d44c3c8f3244017fe1eb102d564eb4ab8ef750
• https://github.com/mpmath/mpmath/releases/tag/1.3.0
• https://github.com/npm/hosted-git-info/pull/76

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