🛡️ CVE-2026-42507 — golang

🟡 CVSS 5.3 — Medium ✅ No Known Exploit NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Affected software

CVE-2026-42507 is recorded against 3 packages.

  • golang
  • stdlib
  • unknown

Timeline and source

Published on 5 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

go.dev (Web)
go.dev (Web)
groups.google.com (Web)
nvd.nist.gov (Web)
pkg.go.dev (Web)

CVE-2026-42507 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-06-05
Updated 2026-08-12
Modified 2026-06-05
Fix URL N/A

Affected Packages

Software From version Fixed in
golang — —
stdlib — —
unknown — —

Similar Threats

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