CVE-2026-42507: Arbitrary inputs are included in errors without any escaping in net/textproto

mediumCVSS 5.3CVE-2026-42507

CSIRTS triage

product: net/textprotoOther

What: Arbitrary inputs are included in error messages without escaping, which can lead to information disclosure.
Who is affected: Applications using net/textproto for network communication.
Urgency: Medium urgency as it has a CVSS score of 5.3, indicating moderate risk.
Action: Update to a version of net/textproto that addresses this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.3
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42507

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-425070.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-42507	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Golang Go: Multiple vulnerabilitiescert-bund

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