CVE-2026-42499
High
Description
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
SeverityHigh
CVSS7.5
Exploit probability—
ProductGo
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-407CWE-407
How to fix
Update
- golang go1.25.10, 1.26.3 or later
- stdlib1.25.10, 1.26.3 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:68334
- access.redhat.com/errata/RHSA-2026:50319
- access.redhat.com/errata/RHSA-2026:59830
- access.redhat.com/errata/RHSA-2026:65838
- access.redhat.com/errata/RHSA-2026:56785
- access.redhat.com/errata/RHSA-2026:56910
- access.redhat.com/errata/RHSA-2026:56852
- access.redhat.com/errata/RHSA-2026:60018
- access.redhat.com/errata/RHSA-2026:57482
- access.redhat.com/errata/RHSA-2026:54552
- access.redhat.com/errata/RHSA-2026:50336
- access.redhat.com/errata/RHSA-2026:57845
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v < 1.25.10, 1.26.0 ≤ v < 1.26.3 | 1.25.10, 1.26.3 |
| stdlibGo | v < 1.25.10, 1.26.0-0 ≤ v < 1.26.3 | 1.25.10, 1.26.3 |
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