Answer in brief
CVE-2026-39832 records a Critical severity (CVSS 9.1) vulnerability in Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent. The current sources do not mark it as known exploited. The current feed maps golang.org/x/crypto/golang.org/x/crypto/ssh/agent (generic), golang.org/x/crypto (go), golang.org/x/crypto/ssh/agent (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-39832 records a Critical severity (CVSS 9.1) vulnerability in Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent. The current sources do not mark it as known exploited. The current feed maps golang.org/x/crypto/golang.org/x/crypto/ssh/agent (generic), golang.org/x/crypto (go), golang.org/x/crypto/ssh/agent (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps golang.org/x/crypto/golang.org/x/crypto/ssh/agent (generic), golang.org/x/crypto (go), golang.org/x/crypto/ssh/agent (go). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| golang.org/x/crypto/golang.org/x/crypto/ssh/agentgeneric | >=0 <0.52.0 | 0.52.0 |
| golang.org/x/cryptogo | <0.52.0 | 0.52.0 |
| golang.org/x/crypto/ssh/agentgo | <0.52.0 | 0.52.0 |
Published upstream
May 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps golang.org/x/crypto/golang.org/x/crypto/ssh/agent (generic), golang.org/x/crypto (go), golang.org/x/crypto/ssh/agent (go). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| golang.org/x/crypto/golang.org/x/crypto/ssh/agentgeneric | >=0 <0.52.0 | 0.52.0 |
| golang.org/x/cryptogo | <0.52.0 | 0.52.0 |
| golang.org/x/crypto/ssh/agentgo | <0.52.0 | 0.52.0 |
Published upstream
May 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
Quoted source text, attributed separately from HOL analysis.