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CVE-2021-29063

27
FAUCET Score

CVE-2021-29063 is a Regular Expression Denial of Service (ReDOS) vulnerability affecting Mpmath versions 1.0.0 through 1.2.1, specifically within the mpmathify function. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely without authentication or user interaction, leading to a complete denial of service. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, <= 1.2.1CPE matchmatch criteria
cpe:2.3:a:mpmath:mpmath:*:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.18%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0418 is in the 82nd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: mpmathFixed in: 1.3.0

Vendor Advisories (1)

pipGHSA-f865-m6cq-j9vxhigh

ReDOS in Mpmath

Aug 9, 2021

References

github.com / fredrik-johansson/mpmath/commit/46d44c3c8f3244017fe1eb102d564eb4ab8ef750
PatchThird Party Advisory
github.com / mpmath/mpmath/releases/tag/1.3.0
github.com / npm/hosted-git-info/pull/76
PatchThird Party Advisory
github.com / yetingli/PoCs/blob/main/CVE-2021-29063/Mpmath.md
ExploitPatchThird Party Advisory
github.com / yetingli/SaveResults/blob/main/js/hosted-git-info.js
Not ApplicableThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3M5O55E7VUDMXCPQR6MQTOIFDKHP36AA
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/EIUX3XWY2K3MSO7QXMZXQQYAURARSPC5
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/MS2U6GLXQSRZJE2HVUAUMVFR2DWQLCZG
npmjs.com / package/hosted-git-info
Product