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Vulnerability details: VCID-p9fd-1qx2-8ubc
Vulnerability ID VCID-p9fd-1qx2-8ubc
Aliases BIT-django-2025-27556
CVE-2025-27556
GHSA-wqfg-m96j-85vm
PYSEC-2025-14
Summary An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-27556.json
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
epss 0.00169 https://api.first.org/data/v1/epss?cve=CVE-2025-27556
cvssv3.1 5.8 https://docs.djangoproject.com/en/dev/releases/security
generic_textual MODERATE https://docs.djangoproject.com/en/dev/releases/security
cvssv3.1 5.8 https://docs.djangoproject.com/en/dev/releases/security/
ssvc Track https://docs.djangoproject.com/en/dev/releases/security/
cvssv3.1 5.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-wqfg-m96j-85vm
cvssv3.1 5.8 https://github.com/django/django
generic_textual MODERATE https://github.com/django/django
cvssv3.1 5.8 https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
generic_textual MODERATE https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
cvssv3.1 5.8 https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
generic_textual MODERATE https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
cvssv3.1 5.8 https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
generic_textual MODERATE https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
cvssv3.1 5.8 https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
generic_textual MODERATE https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
cvssv3.1 5.8 https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
generic_textual MODERATE https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
cvssv3.1 5.8 https://groups.google.com/g/django-announce
generic_textual MODERATE https://groups.google.com/g/django-announce
ssvc Track https://groups.google.com/g/django-announce
cvssv3.1 5.8 https://nvd.nist.gov/vuln/detail/CVE-2025-27556
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2025-27556
cvssv3.1 5.8 https://www.djangoproject.com/weblog/2025/apr/02/security-releases
generic_textual MODERATE https://www.djangoproject.com/weblog/2025/apr/02/security-releases
cvssv3.1 5.8 https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
ssvc Track https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
cvssv3.1 5.8 http://www.openwall.com/lists/oss-security/2025/04/02/2
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2025/04/02/2
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-27556.json
https://api.first.org/data/v1/epss?cve=CVE-2025-27556
https://docs.djangoproject.com/en/dev/releases/security
https://docs.djangoproject.com/en/dev/releases/security/
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/django/django
https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
https://groups.google.com/g/django-announce
https://nvd.nist.gov/vuln/detail/CVE-2025-27556
https://www.djangoproject.com/weblog/2025/apr/02/security-releases
https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
http://www.openwall.com/lists/oss-security/2025/04/02/2
2356899 https://bugzilla.redhat.com/show_bug.cgi?id=2356899
GHSA-wqfg-m96j-85vm https://github.com/advisories/GHSA-wqfg-m96j-85vm
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-27556.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://docs.djangoproject.com/en/dev/releases/security
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://docs.djangoproject.com/en/dev/releases/security/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-02T13:21:14Z/ Found at https://docs.djangoproject.com/en/dev/releases/security/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/django/django
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/django/django/commit/2cb311f7b069723027fb5def4044d1816d7d2afd
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/django/django/commit/39e2297210d9d2938c75fc911d45f0e863dc4821
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/django/django/commit/8c6871b097b6c49d2a782c0d80d908bcbe2116f1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/django/django/commit/edc2716d01a6fdd84b173c02031695231bcee1f8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-14.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://groups.google.com/g/django-announce
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-02T13:21:14Z/ Found at https://groups.google.com/g/django-announce
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2025-27556
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://www.djangoproject.com/weblog/2025/apr/02/security-releases
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-02T13:21:14Z/ Found at https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Found at http://www.openwall.com/lists/oss-security/2025/04/02/2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Exploit Prediction Scoring System (EPSS)
Percentile 0.38157
EPSS Score 0.00169
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:50:16.129724+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/django/PYSEC-2025-14.yaml 38.0.0