How severe is CVE-2026-6907?

CVE-2026-6907 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-6907 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6907?

CVE-2026-6907 affects Djangoproject Django. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6907?

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

Does CVE-2026-6907 have an EU (EUVD) identifier?

Yes. CVE-2026-6907 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27382.

When was CVE-2026-6907 published?

CVE-2026-6907 was published on 2026-05-05 and last updated on 2026-06-17.

CVE-2026-6907

CVE-2026-6907 is a medium-severity vulnerability in Djangoproject Django with a CVSS 3.x base score of 4.3. 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-524.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 2.3
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27382
Weakness: CWE-524
Affected product: Djangoproject Django
Published: 2026-05-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-6907?: 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.
How severe is CVE-2026-6907?: CVE-2026-6907 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-6907 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6907?: CVE-2026-6907 affects Djangoproject Django. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6907?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6907 have an EU (EUVD) identifier?: Yes. CVE-2026-6907 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27382.
When was CVE-2026-6907 published?: CVE-2026-6907 was published on 2026-05-05 and last updated on 2026-06-17.

References

Affected products (1)

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

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