Medium
Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh
Type: advisorySources: OSV
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-39828
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 20:34 UTC · Revision 1
Source evidence
Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh
core-osv · Original sourcePublished 22 May 2026, 02:31 UTC
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
osv:CVE-2026-39828
Complete source record
{
"id": "1cdd5e943716d4f3143882d0ccd0fcc90538285eb42f9b5a82bfc8f58a1c4ed1",
"url": "https://osv.dev/vulnerability/CVE-2026-39828",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh",
"summary": "When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.",
"evidence": "osv:CVE-2026-39828",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-39828",
"aliases": [
"CVE-2026-39828",
"GHSA-45gg-vh54-h5m9",
"GO-2026-5014"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/golang/crypto",
"type": "GIT",
"events": [
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},
{
"fixed": "a1c0d9929856c8aba2b31f079340f00578eda803"
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"cpe": "cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*",
"range": [
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{
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39828.json"
}
}
],
"modified": "2026-10-28T02:30:39.041622796Z",
"provider": "osv",
"references": [
"https://go.dev/cl/781621",
"https://go.dev/issue/79562",
"https://groups.google.com/g/golang-announce/c/a082jnz-LvI",
"https://pkg.go.dev",
"https://pkg.go.dev/vuln/GO-2026-5014",
"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39828.json",
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"https://access.redhat.com/errata/RHSA-2026:36105",
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"https://access.redhat.com/errata/RHSA-2026:36207",
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"https://access.redhat.com/errata/RHSA-2026:36625",
"https://access.redhat.com/errata/RHSA-2026:36648",
"https://access.redhat.com/errata/RHSA-2026:36651",
"https://access.redhat.com/errata/RHSA-2026:36796",
"https://access.redhat.com/errata/RHSA-2026:36797",
"https://access.redhat.com/errata/RHSA-2026:36808",
"https://access.redhat.com/errata/RHSA-2026:37268",
"https://access.redhat.com/errata/RHSA-2026:37271",
"https://access.redhat.com/errata/RHSA-2026:37272",
"https://access.redhat.com/errata/RHSA-2026:37278",
"https://access.redhat.com/errata/RHSA-2026:37286",
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"https://access.redhat.com/errata/RHSA-2026:40118",
"https://access.redhat.com/errata/RHSA-2026:40262",
"https://access.redhat.com/errata/RHSA-2026:40945",
"https://access.redhat.com/errata/RHSA-2026:40969",
"https://access.redhat.com/errata/RHSA-2026:40972",
"https://access.redhat.com/errata/RHSA-2026:40974",
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"https://access.redhat.com/errata/RHSA-2026:47735",
"https://access.redhat.com/errata/RHSA-2026:48151",
"https://access.redhat.com/errata/RHSA-2026:51033",
"https://access.redhat.com/errata/RHSA-2026:51038",
"https://access.redhat.com/errata/RHSA-2026:52857",
"https://access.redhat.com/errata/RHSA-2026:52910",
"https://access.redhat.com/errata/RHSA-2026:54531",
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"https://access.redhat.com/errata/RHSA-2026:66022",
"https://access.redhat.com/errata/RHSA-2026:66521",
"https://access.redhat.com/security/cve/CVE-2026-39828",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39828.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39828",
"https://bugzilla.redhat.com/show_bug.cgi?id=2480687"
],
"provider_metadata": {
"cna_assigner": "Go",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"fixed": "0.52.0"
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"source": "AFFECTED_FIELD",
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39828.json"
}
},
"related_cves": [
{
"value": "CVE-2026-39828",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 506731,
"published_at": "2026-05-22T02:31:26.883+00:00"
}