CVE-2026-8468— Unbounded buffer accumulation in multipart header parsing causes denial of service in plug
Possible ATT&CK Techniques 1AI
T1496 · Resource HijackingAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| elixir-plug | plug | 1.4.0< 1.15.4 | affected |
1.16.0< 1.16.3 | affected | ||
1.17.0< 1.17.1 | affected | ||
1.18.0< 1.18.2 | affected | ||
1.19.0< 1.19.2 | affected | ||
c52b2f32c90bccd718202bafccb5f95594e30183< * | affected |
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I. Basic Information for CVE-2026-8468
Vulnerability Information
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Vulnerability Title
Unbounded buffer accumulation in multipart header parsing causes denial of service in plug
Source: NVD (National Vulnerability Database)
Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in plug_project plug allows denial of service via unbounded buffer accumulation in multipart header parsing. 'Elixir.Plug.Conn':read_part_headers/2 in lib/plug/conn.ex does not obey its :length parameter. There is no upper bound on the size of the accumulated buffer. By contrast, the sibling function read_part_body has an explicit byte_size(acc) > length guard that stops accumulation once a limit is reached. No such guard exists in read_part_headers. An unauthenticated remote attacker can exhaust server memory by sending a crafted multipart/form-data request, causing a denial of service. This issue affects plug from 1.4.0 before 1.15.4, 1.16.3, 1.17.1, 1.18.2, and 1.19.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Plug 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Plug是elixir-plug开源的一个面向Elixir生态的Web应用中间件与连接规范库。 Plug 1.15.4之前版本、1.16.3之前版本、1.17.1之前版本、1.18.2之前版本和1.19.2之前版本存在安全漏洞，该漏洞源于多部分标头解析中缓冲区累积无限制，可能导致未经身份验证的远程攻击者通过发送特制的multipart/form-data请求耗尽服务器内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| elixir-plug | plug | 1.4.0 ~ 1.15.4 | cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:* | |
| elixir-plug | plug | c52b2f32c90bccd718202bafccb5f95594e30183 ~ * | cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-8468
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|---|
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IV. Related Vulnerabilities
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V. Comments for CVE-2026-8468
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