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CVE-2026-77050— Potential denial-of-service vulnerability in get_supported_language_variant()

Quick assessment

Affected
djangoproject Django
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Django 6.1 早期版本至 6.1.2、6.0 早期版本至 6.0.9 以及 5.2 早期版本至 5.2.18 中，发现了一个安全问题。 函数在处理大量不同的、非常长的语言代码时，存在潜在的拒绝服务（DoS）攻击风险。这些语言代码会被作为键保留在内存缓存中，从而消耗大量的进程内存。 此前，不支持的 Django 系列版本（例如 5.1.x、5.0.x 和 4.2.x）未经过安全评估，但也可能受到影响。 Django 项目组感谢 Gleb Lizunov 报告了此安全问题。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-77050

Vulnerability Information
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Vulnerability Title
Potential denial-of-service vulnerability in get_supported_language_variant()
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. `django.utils.translation.get_supported_language_variant()` is subject to a potential denial-of-service attack when processing many distinct, very long language codes, which are retained as keys in an in-memory cache and consume process memory. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Gleb Lizunov for reporting this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
djangoproject Django 6.1 ~ 6.1.2 -

II. Public POCs for CVE-2026-77050

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III. Intelligence Information for CVE-2026-77050

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Vendor Advisories for CVE-2026-77050 (1)

Mailing List Discussions for CVE-2026-77050 (1)

Other References for CVE-2026-77050 (5)

Same Patch Batch · djangoproject · 2026-10-06 · 4 CVEs total

CVE-2026-87890 5.3 MEDIUM Potential request forgery via spatial lookup byte values
CVE-2026-84429 5.3 MEDIUM Potential denial-of-service vulnerability in HTTP header parsing
CVE-2026-87975 4.3 MEDIUM Privilege abuse in model formsets with editable primary keys

IV. Related Vulnerabilities

Same product: Django
Same vendor: djangoproject
Same weakness: CWE-789

V. Comments for CVE-2026-77050

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