GHSA-468c-vq7p-gh64

Source

https://github.com/advisories/GHSA-468c-vq7p-gh64

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-468c-vq7p-gh64

Aliases

Published

2026-05-20T15:35:13Z

Modified

2026-05-20T15:48:07Z

Severity

8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Plug: Unbounded buffer accumulation in multipart header parsing causes denial of service

Details

Summary

An Allocation of Resources Without Limits or Throttling vulnerability in Plug.Conn.read_part_headers/2 allows an unauthenticated attacker to exhaust server memory by sending a crafted multipart/form-data request, causing a denial of service.

Details

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.

Impact

This is a denial-of-service vulnerability. Any application using Plug.Parsers with the :multipart parser, or calling Plug.Conn.read_part_headers/2 directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.

References

Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183
Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203

Database specific

{
    "cwe_ids": [
        "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-20T15:35:13Z",
    "nvd_published_at": "2026-05-14T11:16:18Z",
    "severity": "HIGH"
}

References

Affected packages

Hex / plug

Package

Name: plug
Purl: pkg:hex/plug

Affected ranges

Type: SEMVER
Events: Introduced

1.4.0

Fixed

1.15.4

Affected versions

1.*

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.5.0-rc.0

1.5.0-rc.1

1.5.0-rc.2

1.5.0

1.5.1

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.7.0

1.7.1

1.7.2

1.8.0

1.8.1

1.8.2

1.8.3

1.9.0

1.10.0

1.10.1

1.10.2

1.10.3

1.10.4

1.11.0

1.11.1

1.12.0

1.12.1

1.13.0

1.13.1

1.13.2

1.13.3

1.13.4

1.13.5

1.13.6

1.14.0

1.14.1

1.14.2

1.15.0

1.15.1

1.15.2

1.15.3

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json"

Hex / plug

Package

Name: plug
Purl: pkg:hex/plug

Affected ranges

Type: SEMVER
Events: Introduced

1.16.0

Fixed

1.16.3

Affected versions

1.*

1.16.0

1.16.1

1.16.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json"

Hex / plug

Package

Name: plug
Purl: pkg:hex/plug

Affected ranges

Type: SEMVER
Events: Introduced

1.17.0

Fixed

1.17.1

Affected versions

1.*

1.17.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json"

Hex / plug

Package

Name: plug
Purl: pkg:hex/plug

Affected ranges

Type: SEMVER
Events: Introduced

1.18.0

Fixed

1.18.2

Affected versions

1.*

1.18.0

1.18.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json"

Hex / plug

Package

Name: plug
Purl: pkg:hex/plug

Affected ranges

Type: SEMVER
Events: Introduced

1.19.0

Fixed

1.19.2

Affected versions

1.*

1.19.0

1.19.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-468c-vq7p-gh64/GHSA-468c-vq7p-gh64.json"