Affected: Homebrew: dvc

## Summary

Hydra's `instantiate()` API resolves and invokes Python callables named by the `_target_` field in configuration. The target blacklist introduced for CVE-2026-68508 was incomplete.

Representative bypasses included execution wrappers such as `timeit.timeit`, executable deserialization through `pickle.loads`, and generic dispatch or wrapper targets that obscured the effective callable. Target aliases, callable-returning helpers, and deferred dispatch could similarly bypass name-based checks.

An attacker who can cause an application to instantiate an untrusted Hydra configuration can use these gaps to execute code with the application's privileges.

## Fix

Hydra 1.3.6 expands and hardens the blacklist used by the 1.3 compatibility line. It blocks the reported execution and deserialization surfaces, checks canonical callable identities and aliases, mediates callable results, and blocks generic dispatch and wrapper targets that bypass immediate target checks.

The Hydra 1.3 blacklist is a best-effort, defense-in-depth measure. It is not a complete security boundary and does not make untrusted configuration safe to instantiate.

Hydra 1.4.0.dev9 applies the same hardening and introduces the execution whitelist as the recommended primary security boundary. When a whitelist is supplied, targets are rejected unless trusted Python code authorizes them. If no whitelist is supplied, Hydra preserves legacy behavior with a deprecation warning and the blacklist as a best-eff…

Hydra is a framework for elegantly configuring complex applications. From 1.3.4 until 1.3.6 and 1.4.0.dev9, the instantiate() target blacklist introduced for CVE-2026-68508 incompletely checks the effective callable selected by the target field. Execution wrappers such as timeit.timeit, executable deserialization through pickle.loads, aliases, callable-returning helpers, generic dispatch, and deferred calls can obscure or defer the effective target and bypass name-based authorization. An attacker who causes an application to instantiate untrusted Hydra configuration can use these gaps to execute code with the application's privileges. This issue is fixed in versions 1.3.6 and 1.4.0.dev9.

Affected: PyPI: hydra-core

## Summary

Hydra's `instantiate()` API resolves and invokes Python callables named by the `_target_` field in configuration. The target blacklist introduced for CVE-2026-68508 was incomplete.

Representative bypasses included execution wrappers such as `timeit.timeit`, executable deserialization through `pickle.loads`, and generic dispatch or wrapper targets that obscured the effective callable. Target aliases, callable-returning helpers, and deferred dispatch could similarly bypass name-based checks.

An attacker who can cause an application to instantiate an untrusted Hydra configuration can use these gaps to execute code with the application's privileges.

## Fix

Hydra 1.3.6 expands and hardens the blacklist used by the 1.3 compatibility line. It blocks the reported execution and deserialization surfaces, checks canonical callable identities and aliases, mediates callable results, and blocks generic dispatch and wrapper targets that bypass immediate target checks.

The Hydra 1.3 blacklist is a best-effort, defense-in-depth measure. It is not a complete security boundary and does not make untrusted configuration safe to instantiate.

Hydra 1.4.0.dev9 applies the same hardening and introduces the execution whitelist as the recommended primary security boundary. When a whitelist is supplied, targets are rejected unless trusted Python code authorizes them. If no whitelist is supplied, Hydra preserves legacy behavior with a deprecation warning and the blacklist as a best-eff…

libxml2: Stack Buffer Overflow in xmllint Interactive Shell Command Handling sqlite: SQLite: Arbitrary code execution via crafted FTS5 full-text search data sqlite: SQLite: Arbitrary code execution and crash via heap-based buffer overflow in FTS5 python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory pip: pip: Arbitrary file installation via malicious package indexes GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering xdgmime: heap-based buffer overflow in _xdg_mime_magic_parse_magic_line() in xdgmimemagic.c urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers urllib3: urllib3: Denial of Service due to excessive HTTP response decompression vim: Vim: Arbitrary Code Execution via crafted directory names vim: Vim: Arbitrary code execution via crafted step-definition patterns oauthlib: oauthlib: Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation oauthlib: oauthlib: Timing attack vulnerability in PKCE code_verifier/code_challenge comparison allows authorization code recovery vim: Vim: Arbitrary code execution via Python omni-completion acl: Symlink traversal privilege escalation via libacl functions linux-pam: Plaintext password recovery via timing discrepancy in pam_userdb module vim: Vim: Out-of-bounds Write in Spell File Word Count vim: Vim: Denial of Service via stack out-of-bounds write in spell_soun…