Skip to main content
No exploitation reportedFix available

CVE-2021-29063

No exploitation reported by the sources we read.

  • Published2021-06-21
  • WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-06-2120:15CVE publishedNVD

Versions per branch

NVD · OSV
Mpmath
BranchAffectedFixed in
1.x≥ 1.0.0, ≤ 1.2.1no fix published
mpmath
BranchAffectedFixed in
1.3< 1.3.01.3.0
Fedoraproject fedora
BranchAffectedFixed in
33.x= 33no fix published
34.x= 34no fix published
35.x= 35no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mpmathUbuntu:Pro:20.04:LTSall versions · fixed in 1.1.0-2ubuntu0.1~esm1
  • mpmathUbuntu:Pro:18.04:LTSall versions · fixed in 1.0.0-1ubuntu0.1~esm1
  • mpmathUbuntu:Pro:16.04:LTSall versions · fixed in 0.19-3ubuntu0.1~esm1
  • mpmathDebian:14all versions · fixed in 1.2.1-2
  • mpmathDebian:13all versions · fixed in 1.2.1-2
  • mpmathDebian:12all versions · fixed in 1.2.1-2
  • py3.10-mpmathWolfiall versions · fixed in 1.4.0-r1and 3 other packages
  • py3.10-mpmathChainguardall versions · fixed in 1.4.0-r1and 3 other packages

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-29063 Red Hat Product Security

    python-mpmath: Regular expression denial of service in the mpmathify function

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-06-21
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-f865-m6cq-j9vx

Frequently asked questions

What is CVE-2021-29063?

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.

Is CVE-2021-29063 actively exploited?

Active exploitation of CVE-2021-29063 has not been confirmed. Its EPSS score was 4.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-29063?

CVE-2021-29063 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running mpmath? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record