Vulnerability · Published May 22, 2026 · Assigned by Go
CVE-2026-46598Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent
Medium 5.3
In plain English
A medium-severity security flaw in golang.org/x/crypto/ssh/agent from golang.org/x/crypto. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 64.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-go.crypto | no fix listed | DEBIAN-CVE-2026-46598 |
| Debian:13 | golang-go.crypto | no fix listed | DEBIAN-CVE-2026-46598 |
| Debian:14 | golang-go.crypto | 1:0.52.0-1 | DEBIAN-CVE-2026-46598 |
| Go | golang.org/x/crypto | 0.52.0 | GO-2026-5033 |
| Go | golang.org/x/crypto | 0.52.0 | GHSA-9m57-25v3-79x9 |
| Ubuntu:25.10 | golang-go.crypto | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:26.10 | golang-go.crypto | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:22.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:24.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:25.10 | google-guest-agent | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:26.04:LTS | google-guest-agent | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:26.10 | google-guest-agent | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:22.04:LTS | snapd | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:24.04:LTS | snapd | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:25.10 | snapd | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:26.04:LTS | snapd | no fix listed | UBUNTU-CVE-2026-46598 |
| Ubuntu:26.10 | snapd | no fix listed | UBUNTU-CVE-2026-46598 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent | 0 – before 0.52.0 |
Weakness: CWE-129 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L