Vulnerability · Published Jun 3, 2026 · Assigned by DSF
CVE-2026-6873Signed cookie salt namespace collision in django.http.HttpRequest.get_signed_cookie
Low 3.1
In plain English
A low-severity security flaw in Django from djangoproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15. `django.http.HttpRequest.get_signed_cookie` in Django uses a non-injective salt derivation (concatenating the cookie name and salt argument), which allows a remote attacker to use a cookie in a context different from the one where it was signed, via distinct `(name, salt)` pairs that produce the same concatenation. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Peng Zhou for reporting this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | py3-django | 5.2.15-r0 | ALPINE-CVE-2026-6873 |
| Debian:12 | python-django | no fix listed | DEBIAN-CVE-2026-6873 |
| Debian:13 | python-django | no fix listed | DEBIAN-CVE-2026-6873 |
| Debian:14 | python-django | 3:5.2.15-1 | DEBIAN-CVE-2026-6873 |
| PyPI | django | 5.2.15 | GHSA-h7pc-vwp9-298g |
| PyPI | django | 6.0.6 | GHSA-h7pc-vwp9-298g |
| PyPI | django | 5.2.15, 6.0.6 | PYSEC-2026-199 |
| Ubuntu:22.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-6873 |
| Ubuntu:24.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-6873 |
| Ubuntu:25.10 | python-django | no fix listed | UBUNTU-CVE-2026-6873 |
| Ubuntu:26.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-6873 |
| Ubuntu:26.10 | python-django | no fix listed | UBUNTU-CVE-2026-6873 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | 6.0 – before 6.0.65.2 – before 5.2.15 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- Django security releases issued: 6.0.6 and 5.2.15 vendor-advisory