PYSEC-2026-1812

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/pydantic/PYSEC-2026-1812.yaml
JSON Data
https://api.test.osv.dev/v1/vulns/PYSEC-2026-1812
Aliases
Published
2026-07-07T11:45:38.517274Z
Modified
2026-07-07T17:47:07.788175904Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Pydantic regular expression denial of service
Details

Regular expression denial of service in Pydantic < 2.4.0, < 1.10.13 allows remote attackers to cause denial of service via a crafted email string.

References

Affected packages

PyPI / pydantic

Package

Name
pydantic
View open source insights on deps.dev
Purl
pkg:pypi/pydantic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.10.13
Introduced
2.0.0
Fixed
2.4.0

Affected versions

0.*
0.0.1
0.0.2
0.0.3
0.0.4
0.0.5
0.0.6
0.0.7
0.0.8
0.1
0.2
0.2.1
0.3
0.4
0.5
0.6
0.6.1
0.6.2
0.6.3
0.6.4
0.7
0.7.1
0.8
0.9
0.9.1
0.10
0.11
0.11.1
0.11.2
0.12
0.12.1
0.13
0.13.1
0.14
0.15
0.16
0.16.1
0.17
0.18
0.18.1
0.18.2
0.19
0.20a1
0.20
0.20.1
0.21
0.22
0.23
0.24
0.25
0.26
0.27a1
0.27
0.28
0.29
0.30
0.30.1
0.31
0.31.1
0.32
0.32.1
0.32.2
1.*
1.0b1
1.0b2
1.0
1.1
1.1.1
1.2
1.3
1.4
1.5
1.5.1
1.6
1.6.1
1.6.2
1.7
1.7.1
1.7.2
1.7.3
1.7.4
1.8
1.8.1
1.8.2
1.9.0a1
1.9.0a2
1.9.0
1.9.1
1.9.2
1.10.0a1
1.10.0a2
1.10.0b1
1.10.0
1.10.1
1.10.2
1.10.3
1.10.4
1.10.5
1.10.6
1.10.7
1.10.8
1.10.9
1.10.10
1.10.11
1.10.12
2.*
2.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.2.0
2.2.1
2.3.0

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/pydantic/PYSEC-2026-1812.yaml"