VulnerabilityAwaiting Analysis
CVE-2026-42504
Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
HIGH 7.5EPSS 0.56%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.56%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.56% probability · 45th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-407
- Source
- security@golang.org
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.