GHSA-v422-hmwv-36x6

Suggest an improvement
Source
https://github.com/advisories/GHSA-v422-hmwv-36x6
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v422-hmwv-36x6/GHSA-v422-hmwv-36x6.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-v422-hmwv-36x6
Aliases
Downstream
CGA (201)
MINI (20)
Published
2026-07-20T23:23:26Z
Modified
2026-09-10T03:50:53Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
body-parser vulnerable to denial of service when invalid limit value silently disables size enforcement
Details

Impact

When body-parser is configured with an invalid limit option value, such as an unparseable string or NaN, bytes.parse() returns null and the request body size check is silently skipped. Applications that rely on limit as their primary safeguard against oversized request bodies will accept arbitrarily large payloads, leading to excessive memory and CPU usage and denial of service.

This issue affects applications that pass a programmatically computed or user-configurable value to the limit option without validating it first.

Patches

This issue is fixed in body-parser@2.3.0 and body-parser@1.20.6 via #698. After the fix, invalid limit values throw a clear error at parser construction time instead of silently disabling enforcement. null and undefined continue to fall back to the default limit (100kb).

Workarounds

Validate limit before passing it to body-parser. For example, parse the value with bytes.parse() at startup and reject any configuration where it returns null or a non-finite number.

References

Database specific 
{
    "cwe_ids":  [
        "CWE-770"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-20T23:23:26Z",
    "nvd_published_at":  "2026-07-09T11:16:24Z",
    "severity":  "LOW"
}
References

Affected packages

npm / body-parser

Package

Name
body-parser
View open source insights on deps.dev
Purl
pkg:npm/body-parser

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.20.6

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v422-hmwv-36x6/GHSA-v422-hmwv-36x6.json"

npm / body-parser

Package

Name
body-parser
View open source insights on deps.dev
Purl
pkg:npm/body-parser

Affected ranges

Type
SEMVER
Events
Introduced
2.0.0
Fixed
2.3.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-v422-hmwv-36x6/GHSA-v422-hmwv-36x6.json"