CVE-2025-14550 | Potential denial-of-service vulnerability via repeated headers when using ASGI

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.

Published: 2026-02-03 Last update: 2026-02-04 Assigner: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 Source: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

Conclusion & alert: CVE-2025-14550 is rated Low Risk (35.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-14550

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-04 0.05% 0.05% +0.01%
2 2026-03-01 0.05% 0.05% -0.01%
3 2026-02-13 0.05%

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-14550

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-14550

GitHub Security Advisory for CVE-2025-14550

GHSA-33mw-q7rj-mjwj · Severity: low · Ecosystem: pip — Django has Inefficient Algorithmic Complexity

OS Trackers for CVE-2025-14550

vendor priority summary link
alpine CVE-2025-14550: 1 source package rows (py3-django); 2 state rows across 2 repos (3.23-community, edge-community); fixed 2, open 0. https://security.alpinelinux.org/vuln/CVE-2025-14550
debian unimportant CVE-2025-14550 unimportant priority: Debian including 1 source packages (python-django), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-14550
redhat medium https://access.redhat.com/security/cve/CVE-2025-14550
suse high CVE-2025-14550 severity important: SUSE including 13 source package names (python311-Django-4.2.11-150600.3.47.1, python311-Django-5.2.11-1.1, …), 14 product×package rows across 4 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP7, openSUSE Leap 15.6, openSUSE Leap 16.0, openSUSE Tumbleweed): Fixed 14. https://www.suse.com/security/cve/CVE-2025-14550/
ubuntu medium CVE-2025-14550 medium priority: Ubuntu including 1 source packages (python-django), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): not-affected 4, released 4. https://ubuntu.com/security/CVE-2025-14550

Affected software / configurations for CVE-2025-14550

Vendor Product Version Raw CPE
djangoproject django >= 4.2, < 4.2.28 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django >= 5.2, < 5.2.11 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django >= 6.0, < 6.0.2 cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

References for CVE-2025-14550

cvelogic Threat Intelligence