CVE-2026-106439

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Source
https://cve.org/CVERecord?id=CVE-2026-106439
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106439.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-106439
Aliases
Published
2026-10-06T18:49:12Z
Modified
2026-10-07T10:45:39Z
Severity
  • 8.5 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Hydra: Mutable instantiate policy sets allow target blocklist bypass
Details

Hydra is a framework for elegantly configuring complex applications. From 1.3.4 until 1.3.7 and 1.4.0.dev10, Hydra stores legacy instantiate target blocklists and related execution-policy collections in mutable module-level state. An attacker who controls multiple sibling target entries can resolve hydra._internal.target_policy.UNCONTROLLED_EXECUTION_TARGETS.discard through instantiate(), remove a denied target, and then invoke that target because sibling nodes are processed in insertion order against the same modified policy. The mutation persists in process-global state and can enable code execution with the application's privileges, while a narrow execution whitelist supplied by trusted Python code is not bypassed by the reported direct mutation path. This issue is fixed in versions 1.3.7 and 1.4.0.dev10.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-470",
        "CWE-693"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106439.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "1.4.0.dev4"
                },
                {
                    "fixed": "1.4.0.dev10"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/hydra-ecosystem/hydra

Affected ranges

Type
GIT
Repo
https://github.com/hydra-ecosystem/hydra
Events
Introduced
81070c4266f2c7e0bb614f84585b3bd0cb721ce1
Fixed
81715a5a258ae2657369344f4e3523e5fbabb2af
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.3.4"
        },
        {
            "fixed": "1.3.7"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*
v1.3.4
v1.3.5
v1.3.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106439.json"