VulnerabilityAnalyzed
CVE-2026-34752
Prior to version 3.1.4, sending an email with __proto__: as a header name crashes the Haraka worker process.
HIGH 8.7EPSS 0.43%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Haraka is a Node.js mail server. Prior to version 3.1.4, sending an email with __proto__: as a header name crashes the Haraka worker process. This issue has been patched in version 3.1.4.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.43% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-248
- Affected
- haraka project/haraka
- Source
- security-advisories@github.com
References
- https://github.com/haraka/Haraka/releases/tag/v3.1.4Release Notes
- https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.