CVE Tools
Sign in

CVE-2026-42499

Quadratic string concatenation in consumePhrase in net/mail

Published: May 7, 2026Updated: May 13, 2026 Sources: CVE List NVD BDUNVD-CWE-noinfo
7.5HIGH
NVD MITRE
EPSS Score
0.6%
Top 57.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

net/mailGo standard library
LibraryLibrary
OSS Libraries / generic-library
gogolangOSS Libraries
GoThe Go ProjectOSS Libraries
go standard libraryoss-projectUSOSS Librariesaka golang standard library, net/http, crypto/x509, html/template
golangoss-projectUSOSS Libraries
the go projectoss-projectOSS Librariesaka go, golang-google-protobuf, crypto

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

References

https://go.dev/issue/78987
go.dev
https://go.dev/cl/771520
go.dev
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
groups.google.com
and 1 more references View all →

Timeline

Published
May 7, 2026
Last Updated
May 13, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-42499 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows