Affected: Homebrew: aider

### Impact Services using internationalized (non-ASCII) domain names are potentially vulnerable to TLS connections made from AnyIO's `connect_tcp()` or directly via `TLSStream.wrap()` where the connection has (through other means) been hijacked and redirected to a malicious server. The attacker would obtain a legitimate certificate using the IDNA 2003 encoded version of the domain name and offer it to the connecting client, making the certificate validate properly on the client's end.

### Patches The vulnerability will be patched in v4.14.2.

### Workarounds Encode host names via the `idna` package prior to connecting.

Affected: CleanStart: airflow-3

CVE-2026-63374 affects multiple packages. AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. See references for individual vulnerability details.

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.

Affected: PyPI: anyio

### Impact Services using internationalized (non-ASCII) domain names are potentially vulnerable to TLS connections made from AnyIO's `connect_tcp()` or directly via `TLSStream.wrap()` where the connection has (through other means) been hijacked and redirected to a malicious server. The attacker would obtain a legitimate certificate using the IDNA 2003 encoded version of the domain name and offer it to the connecting client, making the certificate validate properly on the client's end.

### Patches The vulnerability will be patched in v4.14.2.

### Workarounds Encode host names via the `idna` package prior to connecting.

libxml2: Stack Buffer Overflow in xmllint Interactive Shell Command Handling github.com/pallets/click: Pallets Click: Arbitrary command execution via command injection in click.edit() 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 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 vllm: vLLM: Denial of Service via memory exhaustion from oversized media files 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 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_soundfold_sofo() vim: Vim: Arbitrary code execution via malicious docstrings in Python omni-completion msgpack: MessagePack for Python: Den…

Affected: Ubuntu:22.04:LTS: python-anyio, Ubuntu:24.04:LTS: python-anyio, Ubuntu:26.04:LTS: python-anyio

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.