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Vulnerabilities

Vulnerability · CVE-2026-42507

When returning errors, functions in the net/textproto package would include its input as part of the error.

Published Jun 2, 2026 · catalog updated Jul 22, 2026 · When returning errors, functions

Check if you run it

No confirmed exploitation is on record for CVE-2026-42507. EPSS is 0.41%. Act only if a listed version of When returning errors, functions is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (When returning errors, functions).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.41%
Remediation
Not established
Affected products
See sources for product scope

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 affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-42507

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-42507. EPSS is 0.41%. Act only if a listed version of When returning errors, functions is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.41%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 2, 2026 · NIST NVD

    Detected

    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.

  2. Jul 22, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-42507

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-42507

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-42507

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.