VDB

RHSA-2026:87040

RHSA-2026:87040 PUBLISHED CVSS 6.800000190734863 MEDIUM

Record from redhat · Published October 21, 2026

A flaw was found in Go's crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.

Risk scores

CVSS 3.1
6.800000190734863
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

VendorProductVersions
Red Hatgolang-tests-0:1.26.10-1.el10_0.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-0:1.26.10-1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-bin-0:1.26.10-1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-bin-0:1.26.10-1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-0:1.26.10-1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-race-0:1.26.10-1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgo-toolset-0:1.26.10-1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-src-0:1.26.10-1.el10_0.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-bin-0:1.26.10-1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-0:1.26.10-1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-docs-0:1.26.10-1.el10_0.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgo-toolset-0:1.26.10-1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-race-0:1.26.10-1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgo-toolset-0:1.26.10-1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-bin-0:1.26.10-1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-0:1.26.10-1.el10_0.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-0:1.26.10-1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-race-0:1.26.10-1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-race-0:1.26.10-1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0
Red Hatgolang-misc-0:1.26.10-1.el10_0.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)0:1.26.10-1.el10_0

…and 1 more

Timeline

  • Oct 21, 2026 CVE Published
  • Oct 22, 2026 CVE Updated
  • Oct 22, 2026 Distribution Patch (2 in total, the first dated here)
  • Oct 22, 2026 Security Advisory (2 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln RHSA-2026:87040
vulnetix vdb fixes RHSA-2026:87040

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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/RHSA-2026%3A87040/fixes/registry"

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