medium 4.3

CVE-2026-6907 json

Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware

published 2026-05-05 6 mo ago modified 2026-10-26 13 d ago also BIT-django-2026-6907 , EUVD-2026-27382 , GHSA-5hrc-gvxj-w55p , PYSEC-2026-55

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. `django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`'*'`). This can lead to private data being stored and served. 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 Ahmad Sadeddin for reporting this issue.

Patch / fix

fixed in 3 distros 4

pypi django 5.2.14, 6.0.5
bitnami django 5.2.14, 6.0.5
djangoproject Django 5.2.14, 6.0.5

debian ubuntu opensuse alpine

python-django Debian 14 3:5.2.14-1

debian advisories DEBIAN-CVE-2026-6907

python-django Ubuntu 22.04 LTS 2:3.2.12-2ubuntu1.27
python-django Ubuntu 24.04 LTS 3:4.2.11-1ubuntu1.16
python-django Ubuntu 25.10 3:5.2.4-1ubuntu2.5
python-django Ubuntu 26.04 LTS 3:5.2.9-0ubuntu4.1
python-django Ubuntu Pro 14.04 LTS 1.6.11-0ubuntu1.3+esm12
python-django Ubuntu Pro 16.04 LTS 1.8.7-1ubuntu5.15+esm13
python-django Ubuntu Pro 18.04 LTS 1:1.11.11-1ubuntu1.21+esm17
python-django Ubuntu Pro 20.04 LTS 2:2.2.12-1ubuntu0.29+esm10

ubuntu advisories UBUNTU-CVE-2026-6907

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

python-Django5 openSUSE Tumbleweed 5.2.16-1.1
python-Django openSUSE Tumbleweed 5.2.14-1.1
python-Django4 openSUSE Tumbleweed 4.2.30-2.1
python-Django6 openSUSE Tumbleweed 6.0.5-1.1

opensuse advisories openSUSE-SU-2026:11270-1 openSUSE-SU-2026:10718-1 openSUSE-SU-2026:10708-1 openSUSE-SU-2026:10709-1

py3-django Alpine 3.24 5.2.14-r0

alpine advisories ALPINE-CVE-2026-6907

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-2026-6907 updated 2026-11-05 cvss 4.3

django: Django: Information Disclosure via erroneous caching of Vary header with asterisk

Red Hat Ansible Automation Platform 2 python-django, automation-controller, ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, +5 more Red Hat Discovery 2 discovery/discovery-server-rhel9 Red Hat OpenStack Platform 16.2 python-django20, python3-django20, python-django20-bash-completion Red Hat OpenStack Platform 17.1 python-django, python3-django Red Hat OpenStack Platform 18.0 python-django Red Hat Satellite 6 python-django, python2-django, python-django-bash-completion

+1 more productsfewer

Red Hat Update Infrastructure 4 for Cloud Providers python-django

affected: workaround, no fix available “Fix deferred”
Red Hat Ansible Automation Platform 2 ansible-automation-platform-27/hub-rhel9, ansible-automation-platform-27/gateway-rhel9, ansible-automation-platform-27/controller-rhel9, ansible-automation-platform-27/lightspeed-rhel9, ansible-automation-platform-27/eda-controller-rhel9, ansible-automation-platform-27/metrics-service-rhel9, +1 more Red Hat Satellite 6 satellite/iop-advisor-backend-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/bootc-automation-portal-rhel9
under investigation

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: 6 mo ago (2026-05-05)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
OSV	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
OSV	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
pypi	django	>=6.0, <6.0.5 >=5.2, <5.2.14	6.0.5 5.2.14
bitnami	django	>=5.2.0, <5.2.14 >=6.0.0, <6.0.5	5.2.14 6.0.5

Affected products

djangoproject Django

Classification

Weakness

CWE-524 Use of Cache Containing Sensitive Information

Technology feeds

Django rss critical rss

References

docs.djangoproject.com /en/dev/releases/security/
vendor-advisory, advisory
djangoproject.com /weblog/2026/may/05/security-releases/
vendor-advisory, advisory
groups.google.com /g/django-announce
mailing-list, web, third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2026-6907
advisory, web
docs.djangoproject.com /en/dev/releases/security
web
github.com /django/django
package
github.com /pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-55.yaml
web
djangoproject.com /weblog/2026/may/05/security-releases
web
github.com /advisories/GHSA-5hrc-gvxj-w55p
advisory

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.

Summary