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Vulnerability Details :

CVE-2026-42507

Summary
Assigner-Go
Assigner Org ID-1bb62c36-49e3-4200-9d77-64a1400537cc
Published At-02 Jun, 2026 | 22:01
Updated At-03 Jun, 2026 | 19:04
Rejected At-
Credits

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

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Go
Assigner Org ID:1bb62c36-49e3-4200-9d77-64a1400537cc
Published At:02 Jun, 2026 | 22:01
Updated At:03 Jun, 2026 | 19:04
Rejected At:
▼CVE Numbering Authority (CNA)
Arbitrary inputs are included in errors without any escaping in net/textproto

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.

Affected Products
Vendor
Go standard library
Product
net/textproto
Collection URL
https://pkg.go.dev
Package Name
net/textproto
Program Routines
  • parseCodeLine
  • Reader.ReadCodeLine
  • readMIMEHeader
  • Error.Error
  • Reader.ReadMIMEHeader
  • Reader.ReadResponse
Default Status
unaffected
Versions
Affected
  • From 0 before 1.25.11 (semver)
  • From 1.26.0-0 before 1.26.4 (semver)
Problem Types
TypeCWE IDDescription
N/AN/ACWE-532: Insertion of Sensitive Information into Log File
Type: N/A
CWE ID: N/A
Description: CWE-532: Insertion of Sensitive Information into Log File
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://go.dev/issue/79346
N/A
https://go.dev/cl/777060
N/A
https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw
N/A
https://pkg.go.dev/vuln/GO-2026-5039
N/A
Hyperlink: https://go.dev/issue/79346
Resource: N/A
Hyperlink: https://go.dev/cl/777060
Resource: N/A
Hyperlink: https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2026-5039
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@golang.org
Published At:02 Jun, 2026 | 23:16
Updated At:04 Jun, 2026 | 16:15

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CPE Matches
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://go.dev/cl/777060security@golang.org
N/A
https://go.dev/issue/79346security@golang.org
N/A
https://groups.google.com/g/golang-announce/c/tKs3rmcBcKwsecurity@golang.org
N/A
https://pkg.go.dev/vuln/GO-2026-5039security@golang.org
N/A
Hyperlink: https://go.dev/cl/777060
Source: security@golang.org
Resource: N/A
Hyperlink: https://go.dev/issue/79346
Source: security@golang.org
Resource: N/A
Hyperlink: https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw
Source: security@golang.org
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2026-5039
Source: security@golang.org
Resource: N/A

Change History

0
Information is not available yet

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