CVE-2026-42499: CWE-407: Inefficient Algorithmic Complexity in Go standard library net/mail
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
AI Analysis
Technical Summary
This security advisory from Red Hat Product Security concerns a high-severity vulnerability identified as CVE-2026-42499 affecting Red Hat Hardened Images RPMs, specifically golang1.26 packages. The advisory announces an update containing bug fixes and enhancements for these packages. However, the vendor advisory does not explicitly confirm that this update fixes CVE-2026-42499, nor does it provide a direct patch link or remediation instructions specific to this CVE. No exploits are known to be active in the wild. The advisory references updated RPM versions for golang1.26 on aarch64 and x86_64 architectures.
Potential Impact
The vulnerability CVE-2026-42499 is rated as high severity, indicating a significant security risk if exploited. However, the advisory does not provide detailed impact specifics or confirm active exploitation. The affected components are part of Red Hat Hardened Images and golang1.26 RPM packages, which could impact systems using these images and packages. Without explicit details on the vulnerability's nature or exploitability, the precise impact remains unclear.
Mitigation Recommendations
The vendor advisory announces an update for Red Hat Hardened Images RPMs including golang1.26 packages. However, it does not explicitly confirm that this update addresses CVE-2026-42499 or provide direct patch instructions. Patch status is not yet confirmed—check the Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:17714 and https://access.redhat.com/security/cve/CVE-2026-42499 for current remediation guidance. No known exploits are reported, so immediate emergency action may not be required, but applying available updates per Red Hat guidance is recommended once confirmed.
CVE-2026-42499: CWE-407: Inefficient Algorithmic Complexity in Go standard library net/mail
Description
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This security advisory from Red Hat Product Security concerns a high-severity vulnerability identified as CVE-2026-42499 affecting Red Hat Hardened Images RPMs, specifically golang1.26 packages. The advisory announces an update containing bug fixes and enhancements for these packages. However, the vendor advisory does not explicitly confirm that this update fixes CVE-2026-42499, nor does it provide a direct patch link or remediation instructions specific to this CVE. No exploits are known to be active in the wild. The advisory references updated RPM versions for golang1.26 on aarch64 and x86_64 architectures.
Potential Impact
The vulnerability CVE-2026-42499 is rated as high severity, indicating a significant security risk if exploited. However, the advisory does not provide detailed impact specifics or confirm active exploitation. The affected components are part of Red Hat Hardened Images and golang1.26 RPM packages, which could impact systems using these images and packages. Without explicit details on the vulnerability's nature or exploitability, the precise impact remains unclear.
Mitigation Recommendations
The vendor advisory announces an update for Red Hat Hardened Images RPMs including golang1.26 packages. However, it does not explicitly confirm that this update addresses CVE-2026-42499 or provide direct patch instructions. Patch status is not yet confirmed—check the Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:17714 and https://access.redhat.com/security/cve/CVE-2026-42499 for current remediation guidance. No known exploits are reported, so immediate emergency action may not be required, but applying available updates per Red Hat guidance is recommended once confirmed.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:17714
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a5c47792a4a8d5989eb58d2
Added to database: 07/19/2026, 03:41:45 UTC
Last enriched: 07/30/2026, 14:09:58 UTC
Last updated: 07/31/2026, 19:30:14 UTC
Views: 45
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.