zbateson/mail-mime-parser has CRLF header injection via attachment filename

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 0.0018, the 7th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 13:54 UTC First seen by agentprime
2. 31 Oct 2026, 13:54 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-36h5-qg4p-q2qf
• OSV: GHSA-36h5-qg4p-q2qf
• github.com/zbateson/mail-mime-parser/security/advisories/GHSA-36h5-qg4p-q2qf
• nvd.nist.gov/vuln/detail/CVE-2026-61815
• github.com/zbateson/mail-mime-parser/commit/81859c06abb5d79f04b7a3254d293d0a91065948
• github.com/zbateson/mail-mime-parser/commit/d2970b5df266f62e5ee8e675bfb05502b70fc6e1
• github.com/zbateson/mail-mime-parser
• github.com/zbateson/mail-mime-parser/releases/tag/3.0.7
• github.com/zbateson/mail-mime-parser/releases/tag/4.0.2

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.