CVE-2026-86063

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Source
https://cve.org/CVERecord?id=CVE-2026-86063
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86063.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-86063
Aliases
Published
2026-10-13T19:04:11Z
Modified
2026-10-15T02:47:34Z
Severity
  • 7.5 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
Details

Claude Code is an agentic coding tool. Prior to 2.1.179, the Claude Code and Claude Desktop plugin installation flow runs git checkout for a marketplace-pinned commit without verifying that the resulting HEAD equals the pinned 40-character SHA. An attacker who controls a plugin repository on a Git host that permits SHA-shaped branch names can create a branch named after the reviewed commit, causing checkout to select the branch tip and install attacker-controlled plugin code. Exploitation requires a user to install the malicious plugin and pin it to the ostensibly safe hash. This issue is fixed in version 2.1.179.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-494",
        "CWE-829"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86063.json"
}
References

Affected packages

Git / github.com/anthropics/claude-code

Affected ranges

Type
GIT
Repo
https://github.com/anthropics/claude-code
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1b7380874c00e7dcde43b8164d258182d0c0ef18
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.1.179"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v2.*
v2.0.73
v2.0.74
v2.0.76
v2.1.0
v2.1.1
v2.1.100
v2.1.101
v2.1.104
v2.1.105
v2.1.107
v2.1.108
v2.1.109
v2.1.11
v2.1.110
v2.1.111
v2.1.112
v2.1.113
v2.1.114
v2.1.116
v2.1.117
v2.1.118
v2.1.119
v2.1.12
v2.1.120
v2.1.121
v2.1.122
v2.1.123
v2.1.126
v2.1.128
v2.1.129
v2.1.131
v2.1.132
v2.1.133
v2.1.136
v2.1.137
v2.1.138
v2.1.139
v2.1.14
v2.1.140
v2.1.141
v2.1.142
v2.1.143
v2.1.144
v2.1.145
v2.1.146
v2.1.147
v2.1.148
v2.1.149
v2.1.15
v2.1.150
v2.1.152
v2.1.153
v2.1.154
v2.1.156
v2.1.157
v2.1.158
v2.1.159
v2.1.16
v2.1.160
v2.1.161
v2.1.162
v2.1.163
v2.1.165
v2.1.166
v2.1.167
v2.1.168
v2.1.169
v2.1.17
v2.1.170
v2.1.172
v2.1.173
v2.1.174
v2.1.175
v2.1.176
v2.1.177
v2.1.178
v2.1.19
v2.1.2
v2.1.20
v2.1.21
v2.1.22
v2.1.23
v2.1.25
v2.1.27
v2.1.29
v2.1.3
v2.1.30
v2.1.31
v2.1.32
v2.1.33
v2.1.34
v2.1.36
v2.1.37
v2.1.38
v2.1.39
v2.1.4
v2.1.41
v2.1.42
v2.1.44
v2.1.45
v2.1.47
v2.1.49
v2.1.5
v2.1.50
v2.1.51
v2.1.52
v2.1.53
v2.1.55
v2.1.56
v2.1.58
v2.1.59
v2.1.6
v2.1.61
v2.1.62
v2.1.63
v2.1.66
v2.1.68
v2.1.69
v2.1.7
v2.1.70
v2.1.71
v2.1.72
v2.1.73
v2.1.74
v2.1.75
v2.1.76
v2.1.77
v2.1.78
v2.1.79
v2.1.80
v2.1.81
v2.1.83
v2.1.84
v2.1.85
v2.1.86
v2.1.87
v2.1.88
v2.1.89
v2.1.9
v2.1.90
v2.1.91
v2.1.92
v2.1.94
v2.1.96
v2.1.97
v2.1.98

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86063.json"