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CVE-2026-42507

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

Published: Jun 2, 2026Updated: Jun 3, 2026 Sources: CVE List NVD
NVD MITRE
5.3CVSS
MEDIUM

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.

EPSS Score
0.0%
Top 95.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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

Affected Products

net/textproto
Go standard library

Exploitability

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

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 →

Timeline

Published
Jun 2, 2026
Last Updated
Jun 3, 2026

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