CVE-2026-46595 Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh
Attackers can bypass source-address validation in SSH servers if non-public-key callbacks are used, requiring specific server configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46595?
CVE-2026-46595 is a critical authentication bypass vulnerability in golang.org/x/crypto/ssh, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.
Which versions are affected by CVE-2026-46595?
3 open source packages ship an affected version, including golang.org/x/crypto. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang.org/x/crypto Go | All versions | 0.52.0 |
golang.org/x/crypto Go | All versions | 0.52.0 |
golang.org/x/crypto Go | All versions | 0.52.0 |
Linux distribution packages (1)
distribution openSUSE:Tumbleweed | All versions | 3.1.2-1.1 |
Products include Golang Crypto.
How do I fix CVE-2026-46595?
Upgrade golang.org/x/crypto to 0.52.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-46595 being exploited?
There is no known exploitation of CVE-2026-46595 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in golang.org/x/crypto/ssh
- CVE-2026-39830 Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh
- CVE-2026-39831 Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh
- CVE-2026-39832 Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent
- CVE-2026-39833 Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
- CVE-2026-39834 Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh
Sources
Also known as AZL-87179, AZL-87227, AZL-87326, BELL-CVE-2026-46595, CLEANSTART-2026-AM91695, CLEANSTART-2026-BD72670 and 1121 more.