An issue was discovered in Django 6.0 before 6.0.9 and 5.2 before 5.2.18. GeoDjango's `django.contrib.gis.geos.GEOSGeometry` is subject to a potential denial-of-service when parsing deeply nested `GEOMETRYCOLLECTION` objects supplied as well-known text (WKT), well-known binary (WKB), or hex-encoded WKB, which triggers unbounded recursion and a segmentation fault in the underlying GEOS library. Spatial field lookups and the `django.contrib.gis.forms.GeometryField` form field are also affected. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Andrew MacPherson and kimchunbok_ for reporting this issue.
https://groups.google.com/g/django-announce
https://github.com/django/django/commit/d2e59b77fe18de318a8272c2a7bbc798d84d1d0d
https://github.com/django/django/commit/ba80833fa656dd09660b97c4429331067db1b080
https://github.com/django/django/commit/9e4a3f186b6b07b483bfd9195ea06734663fcd06
https://github.com/django/django/commit/75d401a1491e04a907ed745c128836d51c982c0f
https://github.com/django/django/commit/6af5da31775417c610dbf9c3f1b5b8333d42daf6
https://github.com/django/django/commit/62ef9d40cf4ea75f16518436b44b8ab2515340df
https://github.com/django/django/commit/4353dfb56f8ba3a6fccc4bdd7f2ef2fbee3aa638
https://github.com/django/django/commit/1eafa1a80f1363283f89208ba4499ed54e35f085
Published: 2026-08-04
Updated: 2026-10-24
Named Vulnerability: GHSA-q238-5cxm-5c9h
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Severity: High
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity: Medium
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.01113