CVE-2026-42507— Arbitrary inputs are included in errors without any escaping in net/textproto
Possible ATT&CK Techniques 1AI
T1562.001Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go standard library | net/textproto | < 1.25.11 | affected |
1.26.0-0< 1.26.4 | affected |
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I. Basic Information for CVE-2026-42507
Vulnerability Information
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Vulnerability Title
Arbitrary inputs are included in errors without any escaping in net/textproto
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Go standard library | net/textproto | 0 ~ 1.25.11 | - |
II. Public POCs for CVE-2026-42507
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Patches & Fixes for CVE-2026-42507 (1)
News Coverage for CVE-2026-42507 (1)
Vendor Pages for CVE-2026-42507 (1)
Other References for CVE-2026-42507 (1)
Same Patch Batch · Go standard library · 2026-06-02 · 3 CVEs total
| CVE-2026-42504 | Quadratic complexity in WordDecoder.DecodeHeader in mime | |
| CVE-2026-27145 | Inefficient candidate hostname parsing in crypto/x509 |
IV. Related Vulnerabilities
Same vendor: Go standard library
- CVE-2026-42504
Quadratic complexity in WordDecoder.DecodeHeader in mime - CVE-2026-27145
Inefficient candidate hostname parsing in crypto/x509 - CVE-2026-39823
Bypass of meta content URL escaping causes XSS in html/templ - CVE-2026-39820
Quadratic string concatentation in consumeComment in net/mai - CVE-2026-42499
Quadratic string concatenation in consumePhrase in net/mail
V. Comments for CVE-2026-42507
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