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EPSS 0.8%top 47%

CVE-2026-42499: CWE-407: Inefficient Algorithmic Complexity in Go standard library net/mail

0
High
Published: 05/07/2026 (05/07/2026, 19:41:18 UTC)
Source: GCVE Database
Vendor/Project: Go standard library
Product: 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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Affected versions
Red HatRed Hat Hardened Imagesaarch64golang1-25-main@aarch6401.26.0-0

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/30/2026, 14:09:58 UTC

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.

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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

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