CVE-2025-14550
Potential denial-of-service vulnerability via repeated headers when using ASGI
Reported by dsf · Published February 3, 2026
Django is fixed in 6.0.2, 5.2.11 and 4.2.28 (PyPI)
An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. `ASGIRequest` allows a remote attacker to cause a potential denial-of-service via a crafted request with multiple duplicate headers. 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 Jiyong Yang for reporting this issue.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Django | PyPI | 6.0.2, 5.2.11, 4.2.28 |
| asgiref | PyPI | 3.11.1 |
| django | Bitnami | 6.0.2, 5.2.11, 4.2.28 |
| authentik | Chainguard | 2025.12.1-r2 |
| awx | Chainguard | 24.6.1-r27 |
| py3-django | Alpine | 4.2.28-r0 |
| authentik-fips | Chainguard | 2025.12.1-r2 |
| label-studio | Chainguard | 1.22.0-r3 |
| django | djangoproject | 6.0.2, 5.2.11, 4.2.28 |
| django | Bitnami | 6.0.2, 5.2.11, 4.2.28 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | 6.0, 6.0.2, 5.2 |
| djangoproject | asgiref | 3, 3.11.1 |
| PyPI | Django | 4.2.0-a.1, 6.0.0-a.1, 5.2.0-a.1 |
| chainguard | authentik | 0 |
| chainguard | awx | 0 |
| djangoproject | asgiref | 3.11.1, 3 |
| djangoproject | Django | 6.0.2, 5.2, 5.2.11 |
| alpine | py3-django | 0 |
| chainguard | authentik-fips | 0 |
| chainguard | label-studio | 0 |
| djangoproject | django |
Timeline
- Feb 3, 2026 CVE Published
- Feb 3, 2026 PoC Published (4 in total, the first dated here)
- Feb 4, 2026 EPSS Score (30 in total, the first dated here)
- Mar 9, 2026 Security Advisory (18 in total, the first dated here)
- Mar 27, 2026 Distribution Patch (11 in total, the first dated here)
- Jun 22, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-14550
vulnetix vdb fixes CVE-2025-14550Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-14550/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- Django security releases issued: 6.0.2, 5.2.11, and 4.2.28 vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-14550 advisory
- https://github.com/advisories/GHSA-33mw-q7rj-mjwj advisory
- https://docs.djangoproject.com/en/dev/releases/security url
- https://www.djangoproject.com/weblog/2026/feb/03/security-releases url
- https://github.com/django/django/commit/eb22e1d6d643360e952609ef562c139a100ea4eb patch
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-43.yaml advisory