Potential exposure of private data via missing Vary: Authorization in UpdateCacheMiddleware (djangoproject Django)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.37 % · percentile 31 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- DSF
- NVD status
- Analyzed
Description
An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCacheMiddleware` in Django does not add `Authorization` to the `Vary` response header for requests bearing that header without `Cache-Control: public`, which allows remote attackers to read private cached responses via unauthenticated requests to the same URL. 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 Shai Berger for reporting this issue.
Weaknesses (CWE)
- CWE-524 — Use of Cache Containing Sensitive Information
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | LOW 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N | DSF |
| CVSS 4.0 | LOW 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 | DSF |
| CVSS 4.0 | LOW 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 · 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 (Secondary) |
| CVSS 3.1 | LOW 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N | NVD · 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 (Secondary) |
Advisories
- GHSA-qpc8-7fxc-cm4p — Django: UpdateCacheMiddleware may disclose private cached responses by omitting Authorization from Vary
- PYSEC-2026-197 — An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.
European references
- ENISA EUVD · EUVD-2026-34089
- GCVE · GCVE-0-2026-35193
Affected configurations (NVD CPE)
cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*≥ 5.2 < 5.2.15cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*≥ 6.0 < 6.0.6
Affected products
| Product | Versions |
|---|---|
| djangoproject · Django | affected 6.0 < 6.0.6 ; unaffected 6.0.6 ; affected 5.2 < 5.2.15 ; unaffected 5.2.15 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |