How severe is CVE-2026-48587?

CVE-2026-48587 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-48587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48587?

CVE-2026-48587 affects Djangoproject Django. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48587?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-48587 have an EU (EUVD) identifier?

Yes. CVE-2026-48587 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34090.

When was CVE-2026-48587 published?

CVE-2026-48587 was published on 2026-06-03 and last updated on 2026-06-17.

CVE-2026-48587

CVE-2026-48587 is a low-severity vulnerability in Djangoproject Django with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1023.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v4: 2.3
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34090
Weakness: CWE-1023
Affected product: Djangoproject Django
Published: 2026-06-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-48587?: 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 severe is CVE-2026-48587?: CVE-2026-48587 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-48587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48587?: CVE-2026-48587 affects Djangoproject Django. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48587?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-48587 have an EU (EUVD) identifier?: Yes. CVE-2026-48587 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34090.
When was CVE-2026-48587 published?: CVE-2026-48587 was published on 2026-06-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

More vulnerabilities in Djangoproject Django

CVE-2014-0474 — Critical (CVSS 10.0): The (1) FilePathField, (2) GenericIPAddressField, and (3) IPAddressField model field classes in Django before 1.4.11,…
CVE-2026-4277 — Critical (CVSS 9.8): An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. Add permissions on inline model…
CVE-2024-53908 — Critical (CVSS 9.8): An issue was discovered in Django 5.1 before 5.1.4, 5.0 before 5.0.10, and 4.2 before 4.2.17. Direct usage of the…
CVE-2023-31047 — Critical (CVSS 9.8): In Django 3.2 before 3.2.19, 4.x before 4.1.9, and 4.2 before 4.2.1, it was possible to bypass validation when using…
CVE-2022-34265 — Critical (CVSS 9.8): An issue was discovered in Django 3.2 before 3.2.14 and 4.0 before 4.0.6. The Trunc() and Extract() database functions…
CVE-2022-28347 — Critical (CVSS 9.8): A SQL injection issue was discovered in QuerySet.explain() in Django 2.2 before 2.2.28, 3.2 before 3.2.13, and 4.0…

All CVEs affecting Djangoproject Django →

Other CWE-1023 vulnerabilities

CVE-2026-4599 — Critical (CVSS 9.1): Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to Incomplete Comparison with Missing…
CVE-2025-62000 — High (CVSS 7.1): BullWall Ransomware Containment may not always detect an encrypted file. This issue affects a specific file inspection…
CVE-2026-53839 — Medium (CVSS 6.5): OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching…
CVE-2025-55333 — Medium (CVSS 6.1): Incomplete comparison with missing factors in Windows BitLocker allows an unauthorized attacker to bypass a security…
CVE-2026-7473 — Medium (CVSS 5.8): On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible…
CVE-2025-46722 — Medium (CVSS 4.2): vLLM is an inference and serving engine for large language models (LLMs). In versions starting from 0.7.0 to before…

Browse all CWE-1023 vulnerabilities →