7.5

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

Analyzed
AliasesGHSA-33mw-q7rj-mjwjBIT-django-2025-14550PYSEC-2026-43
Published 03-02-2026Last modified 03-02-2026

Vulnerability summary

CVE-2025-14550 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in djangoproject asgiref. EPSS estimates a 1.11% chance of exploitation in the next 30 days, higher than 66% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.11%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 8
DSA-6150-1MGASA-2026-0032OPENSUSE-SU-2026:10145-1OPENSUSE-SU-2026:10160-1OPENSUSE-SU-2026:10247-1OPENSUSE-SU-2026:11270-1

Timeline

  1. 03-02-2026
    PublishedVulnerability first disclosed.
  2. 03-02-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.11%

Chance of exploitation in the next 30 days

Percentile

66%

Versus all other CVEs

30-day change

Decrease -0.02 pp

From 1.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard4 products
  • authentik< 2025.12.1-r2
  • authentik-fips< 2025.12.1-r2
  • awx< 24.6.1-r27
  • label-studio< 1.22.0-r3
Djangoproject2 products
  • asgiref≥ 3, < 3.11.1
  • django≥ 4.2, < 4.2.28 | ≥ 5.2, < 5.2.11 | ≥ 6.0, < 6.0.2
Alpine1 product
  • py3-django< 4.2.28-r0
Debian1 product
  • python-django< 3:3.2.25-0+deb12u2 | < 3:4.2.28-0+deb13u1 | < 3:4.2.28-1
Opensuse1 product
  • python-asgiref&distro=openSUSE Tumbleweed< 3.11.1-1.1
PyPI1 product
  • django≥ 6.0a1, < 6.0.2 | ≥ 5.2a1, < 5.2.11 | ≥ 4.2a1, < 4.2.28 | ≥ 6.0, < 6.0.2
Ubuntu1 product
  • python-django< 2:3.2.12-2ubuntu1.25 | < 3:4.2.11-1ubuntu1.14 | < 3:5.2.4-1ubuntu2.3

7 vendors · 11 products

References

21 links
Show all 21 references