Cleartext Transmission of Sensitive Information Affecting std/crypto/tls package, versions <1.25.12>=1.26.0-0 <1.26.5>=1.27.0-0 <1.27.0-rc.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-STDCRYPTOTLS-17905406
- published9 Jul 2026
- disclosed7 Jul 2026
- creditCoia Prant
Introduced: 7 Jul 2026
CVE-2026-42505 (opens in a new tab)How to fix?
Upgrade std/crypto/tls to version 1.25.12, 1.26.5, 1.27.0-rc.2 or higher.
Overview
std/crypto/tls is a Go standard library package std/crypto/tls
Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information.
Go Vulnerability Report:
Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.