PT-2026-42711 · Openssh · Openssh

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-39832

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions The product name cannot be determined (affected versions not specified)

Description Constraint extensions, such as [e-mail], were not serialized in requests when adding a key to a remote agent. This caused destination restrictions to be silently stripped during key forwarding, which allowed the key to be used without restrictions on the remote host. Furthermore, the in-memory keyring returned by the NewKeyring() function silently ignored keys with unsupported constraint extensions.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-39832

GO-2026-5006

Affected Products

Openssh

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-39832 · Security Note
• https://osv.dev/vulnerability/GO-2026-5006 · Vendor Advisory
• https://go.dev/cl/778642 · Note
• https://pkg.go.dev/vuln/GO-2026-5006 · Note
• https://groups.google.com/g/golang-announce/c/a082jnz-LvI · Note
• https://go.dev/issue/79435 · Note