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CVE-2026-42507

Arbitrary inputs are included in errors without any escaping in net/textproto

Published: Jun 2, 2026Updated: Jul 22, 2026 Sources: CVE List NVD
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 70.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
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:LIntegrity
Low
A:NAvailability
None
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Affected Products

Go standard library
oss-project·USaka crypto/x509, golang standard library, net/http, html/template
net/textprotoLibraryLibrary
OSS Libraries / go

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://go.dev/cl/777060
go.dev
https://go.dev/issue/79346
go.dev
https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw
groups.google.com
and 1 more references View all →

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