CVE-2026-42499
high
CVSS v3
7.5
CVSS v2
—
VIR risk
7.5
Description
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-42499.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-42499
Vendor advisory: security@golang.org — https://pkg.go.dev/vuln/GO-2026-4977
Vendor advisory: security@golang.org — https://groups.google.com/g/golang-announce/c/qcCIEXso47M
Vendor advisory: security@golang.org — https://go.dev/cl/771520
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | trixie | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 1.25.10-1 |
| debian | sid | fixed | 1.25.10-1 |
| debian | bookworm | affected | |
| sles | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | stdlib | >=1.26.0-0,<1.26.3 | 1.25.10 |
References
Verify integrity in audit chain (admin only). AS-IS.