CVE-2026-39833— Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
Possible ATT&CK Techniques 1AI
T1055 · Process InjectionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent | < 0.52.0 | affected |
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-39833
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
Source: NVD (National Vulnerability Database)
Vulnerability Description
The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent | 0 ~ 0.52.0 | - |
II. Public POCs for CVE-2026-39833
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-39833
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-39833 (2)
Vendor Advisories for CVE-2026-39833 (3)
Same Patch Batch · golang.org/x/crypto · 2026-05-22 · 13 CVEs total
| CVE-2026-42508 | Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts | |
| CVE-2026-39829 | Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh | |
| CVE-2026-39835 | Invoking server panic during CheckHostKey/Authenticate 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-2026-39834 | Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh | |
| CVE-2026-39830 | Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ | |
| CVE-2026-39828 | Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh | |
| CVE-2026-39827 | Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh | |
| CVE-2026-39832 | Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent | |
| CVE-2026-46597 | Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh | |
| CVE-2026-46598 | Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent | |
| CVE-2026-46595 | Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ss |
IV. Related Vulnerabilities
Same product: golang.org/x/crypto/ssh/agent
Same vendor: golang.org/x/crypto
- CVE-2026-42508
Invoking auth bypass via unenforced @revoked status in gola - CVE-2026-46595
Invoking VerifiedPublicKeyCallback permissions skip enforce - CVE-2026-39834
Invoking infinite loop on large channel writes in golang.or - CVE-2026-46598
Invoking pathological inputs can lead to client panic in go - CVE-2026-39829
Invoking pathological RSA/DSA parameters may cause DoS in g
V. Comments for CVE-2026-39833
No comments yet