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Fencer Vulns
high 7.5

CVE-2019-19274 json

typed-ast Out-of-bounds Read

published 2019-11-26 6 y ago modified 2026-06-17 4 mo ago also GHSA-m3jw-62m7-jjcm , PYSEC-2019-130 , EUVD-2019-0149

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

typed_ast 1.3.0 and 1.3.1 has a handle_keywordonly_args out-of-bounds read. An attacker with the ability to cause a Python interpreter to parse Python source (but not necessarily execute it) may be able to crash the interpreter process. This could be a concern, for example, in a web-based service that parses (but does not execute) Python code. (This issue also affected certain Python 3.8.0-alpha prereleases.)

Patch / fix

  • pypi typed-ast 1.3.2
  • python3-typed-ast Debian 12 1.4.0-1

debian advisories DEBIAN-CVE-2019-19274

  • python-typed-ast Package Hub 15 SP1 1.3.1-bp151.2.6.1
  • python-typed-ast openSUSE Leap 15.1 1.3.1-lp151.2.6.1

opensuse advisories openSUSE-SU-2020:0609-1openSUSE-SU-2020:0567-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19274 updated cvss 5.9

python3-typed_ast: out-of-bounds read in handle_keywordonly_args() function

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.28% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi typed-ast
>=1.3.0, <1.3.2
<1.3.2
1.3.2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.