Potential exposure of private data via whitespace padding in Vary header (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.utils.cache.has_vary_header()` in Django does not strip leading or trailing whitespace from `Vary` response header values before comparison, which allows remote attackers to read cached responses via requests to URLs whose responses contain whitespace-padded Vary header values. 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 Navid Rezazadeh for reporting this issue.
Weaknesses (CWE)
- CWE-1023 — Incomplete Comparison with Missing Factors
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) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-923m-gv2p-w5qp — Django: has_vary_header may expose cached responses when Vary values contain whitespace
- PYSEC-2026-198 — An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.
European references
- ENISA EUVD · EUVD-2026-34090
- GCVE · GCVE-0-2026-48587
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 |