Skip to main content
No exploitation reportedFix available

CVE-2022-40023

No exploitation reported by the sources we read.

  • Published2022-09-07
  • WeaknessCWE-1333

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

Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.

Timeline

dates in UTC
  1. 2022-09-0713:15CVE publishedNVD

Versions per branch

NVD · OSV
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Sqlalchemy mako
BranchAffectedFixed in
1.2< 1.2.21.2.2

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

  • makoUbuntu:Pro:16.04:LTSall versions · fixed in 1.0.3+ds1-1ubuntu1+esm1
  • makoUbuntu:22.04:LTSall versions · fixed in 1.1.3+ds1-2ubuntu0.1
  • makoUbuntu:20.04:LTSall versions · fixed in 1.1.0+ds1-1ubuntu2.1
  • makoUbuntu:18.04:LTSall versions · fixed in 1.0.7+ds1-1ubuntu0.2
  • makoDebian:14all versions · fixed in 1.2.2+ds1-1
  • makoDebian:13all versions · fixed in 1.2.2+ds1-1
  • makoDebian:12all versions · fixed in 1.2.2+ds1-1
  • makoDebian:11all versions · fixed in 1.1.3+ds1-2+deb11u1

33 more package ranges on OSV.dev

Vendor advisories

  • CVE-2022-40023 Red Hat Product Security4 products fixed · 21 known affected

    python-mako: REDoS in Lexer class

    python-pecan.src as a component of Red Hat Ceph Storage 3 · python-mako.src as a component of Red Hat Enterprise Linux 6 · python-mako.src as a component of Red Hat Enterprise Linux 7 · +18 more

  • RHSA-2023:2893 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: python-mako security update

  • RHSA-2023:2258 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: python-mako security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2023:2893 · 2 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. No fix available, says the vendor Red Hat Product Security CVE-2022-40023 · 3 productsAffected
  3. No fix planned, says the vendor Red Hat Product Security CVE-2022-40023 · 13 productsOut of support scope
  4. No fix planned, says the vendor Red Hat Product Security CVE-2022-40023 · 5 productsWill not 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
2022-09-07
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-v973-fxgf-6xhp

Frequently asked questions

What is CVE-2022-40023?

Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.

Is CVE-2022-40023 actively exploited?

Active exploitation of CVE-2022-40023 has not been confirmed. Its EPSS score was 2.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-40023?

CVE-2022-40023 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 mako? 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