CVE-2026-124016
5.3 MEDIUMpublic exploit availablePublished 2026-11-10 · Updated 2026-11-10
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD description
postal-mime before 4.2.1 contains an algorithmic complexity denial of service vulnerability that allows unauthenticated remote attackers to cause excessive CPU consumption in the PostalMime.processLine() function by crafting deeply nested multipart email messages with boundary lines sharing long prefixes with open boundaries. Attackers can deliver a malicious email with nesting up to the default maxNestingDepth of 256, causing per-line parsing cost to scale as O(depth x shared prefix length) and blocking the Node.js event loop for seconds per message.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-407
Public exploit & PoC references
All references
- https://github.com/postalsys/postal-mime/releases/tag/v4.2.1
- https://github.com/postalsys/postal-mime/security/advisories/GHSA-q8wm-54mj-r36p
- https://www.vulncheck.com/advisories/postal-mime-algorithmic-complexity-dos-via-processline
- https://github.com/postalsys/postal-mime/security/advisories/GHSA-q8wm-54mj-r36p
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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