CVE Catalog

CVE-2026-8468

High
Published: Translated: NVD NIST

Summary

A vulnerability in plug_project allows denial of service via unbounded buffer accumulation during multipart header parsing. The read_part_headers/2 function does not obey its :length parameter, leading to no upper limit on the buffer size.

Risk Assessment

An unauthenticated remote attacker can exhaust server memory by sending a crafted multipart/form-data request, causing a denial of service.

Recommendation

It is recommended to update plug to version 1.15.4 or later to mitigate the risk associated with this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS