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Fencer Vulns
low 3.1

CVE-2026-6873 json

Signed cookie salt namespace collision in django.http.HttpRequest.get_signed_cookie

published 2026-06-03 5 mo ago modified 2026-09-10 59 d ago also BIT-django-2026-6873 , EUVD-2026-34086 , GHSA-h7pc-vwp9-298g , PYSEC-2026-199

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi django 5.2.15, 6.0.6
  • bitnami django 5.2.15, 6.0.6
  • djangoproject Django 5.2.15, 6.0.6
  • python-django Debian 14 3:5.2.15-1

debian advisories DEBIAN-CVE-2026-6873

  • python-Django SLE Module for Package Hub 15 SP7 4.2.11-150600.3.59.1

suse advisories SUSE-SU-2026:2318-1

  • python-Django5 openSUSE Tumbleweed 5.2.16-1.1
  • python-Django openSUSE Tumbleweed 5.2.15-1.1
  • python-Django6 openSUSE Tumbleweed 6.0.6-1.1
  • python-Django openSUSE Leap 16.0 5.2.4-bp160.9.1
  • python-Django4 openSUSE Tumbleweed 4.2.30-3.1

opensuse advisories openSUSE-SU-2026:11270-1openSUSE-SU-2026:11002-1openSUSE-SU-2026:11003-1openSUSE-SU-2026:20937-1openSUSE-SU-2026:10989-1

  • py3-django Alpine 3.24 5.2.15-r0

alpine advisories ALPINE-CVE-2026-6873

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-6873 updated cvss 3.1

python-django: Django: Information disclosure via non-injective cookie salt derivation

  • Red Hat Ansible Automation Platform 2 automation-controller, ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-27/hub-rhel9, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-27/gateway-rhel9, ansible-automation-platform-24/lightspeed-rhel8, +11 more Red Hat Discovery 2 discovery/discovery-server-rhel9 Red Hat Satellite 6 satellite/iop-advisor-backend-rhel9
    affected: workaround, no fix available “Fix deferred”

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
GitHub 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi django
<5.2.15
>=6.0.0, <6.0.6
>=5.2, <5.2.15
>=6.0, <6.0.6
5.2.15
6.0.6
bitnami django
>=5.2.0, <5.2.15
>=6.0.0, <6.0.6
5.2.15
6.0.6

Affected products

  • djangoproject Django

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature
Technology feeds

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.