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

Downstream

CGA (6)

Published

2026-10-06T18:49:12Z

Modified

2026-10-28T02:31:03Z

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":  [
                {
                    "range":  [
                        {
                            "introduced":  "1.4.0.dev4"
                        },
                        {
                            "fixed":  "1.4.0.dev10"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StringRangeExpression"
                }
            ]
        }
    ]
}

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

Fixed

0dd18084589a3d3e577d1f1a8a48fb485c94a5e6

Fixed

4720dfca2bde27fa140ec287a05709668fbdf168

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.3.4"
                },
                {
                    "fixed":  "1.3.7"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "0dd18084589a3d3e577d1f1a8a48fb485c94a5e6"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "4720dfca2bde27fa140ec287a05709668fbdf168"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v1.3.7",
            "range":  [
                {
                    "fixed":  "81715a5a258ae2657369344f4e3523e5fbabb2af"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

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"