body-parser vulnerable to denial of service when invalid limit value silently disables size enforcement

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0041, the 36th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 9 Jul 2026, 10:16 UTC Published by the maintainers as a GitHub repository advisory

Sources

• GitHub Advisory Database: GHSA-v422-hmwv-36x6
• OSV: GHSA-v422-hmwv-36x6
• github.com/expressjs/body-parser/security/advisories/GHSA-v422-hmwv-36x6
• nvd.nist.gov/vuln/detail/CVE-2026-12590
• github.com/expressjs/body-parser/pull/698
• github.com/expressjs/body-parser/pull/741
• github.com/expressjs/body-parser/commit/2322e111cc321413ec2b7b76d01be533d3de9d7d
• github.com/expressjs/body-parser/commit/3492672eee593d5c158f239b6e9115498a5dbeac
• cna.openjsf.org/security-advisories.html
• github.com/expressjs/body-parser
• github.com/expressjs/body-parser/releases/tag/1.20.6
• github.com/expressjs/body-parser/releases/tag/v2.3.0

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.