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🛡️ CVE-2026-48587 — django

🟢 CVSS 2.0 — Low ✅ No Known Exploit CWE-1023 OSV
2.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Django: has_vary_header may expose cached responses when Vary values contain whitespace

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-48587 is classified as CWE-1023: Incomplete Comparison with Missing Factors. The product performs a comparison between entities that must consider multiple factors or characteristics of each entity, but the comparison does not include one or more of these factors.

Affected software

CVE-2026-48587 is recorded against 1 package.

  • django

Timeline and source

Published on 6 June 2026 and last revised on 10 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

docs.djangoproject.com (Web)
groups.google.com (Web)
nvd.nist.gov (Web)
www.djangoproject.com (Web)

Other advisories for this package

django has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-1023: Incomplete Comparison with Missing Factors) in other software:

CVE-2026-48587 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity LOW
CVSS Score 2.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-1023
Public Exploit ✅ No
Source OSV
Published 2026-06-06
Updated 2026-08-20
Modified 2026-08-10

Affected Packages

Software From version Fixed in
django — —

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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