CVE-2026-39820
Quadratic string concatentation in consumeComment in net/mail
7.5
HIGH
CVSS 3.1
EPSS 0.05%
Description
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
How to fix CVE-2026-39820
To remediate CVE-2026-39820, upgrade the affected package to a fixed version below.
- Bitnami/golang—upgrade to 1.25.10 or later
- —no fix listed
- —no fix listed
- —no fix listed
- —upgrade to 1.25.10-1 or later
- —upgrade to 1.26.3-1 or later
- —upgrade to 1.25.10 or later
Is CVE-2026-39820 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- from 0, < 1.25.10, >= 1.26.0-0, < 1.26.3
- from 0
- from 0
- from 0
- from 0, < 1.25.10-1
- from 0, < 1.26.3-1
- from 0, < 1.25.10, >= 1.26.0-0, < 1.26.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |