CVE-2026-53951

Copier is a library and CLI app for rendering project templates. In versions 9.5.0 through 9.15.1, the trust setting's prefix match copier/settings.py compares the template URL against a trusted prefix with a raw str.startswith and no path normalization, while the URL is normalized when the...

PT-2026-56503

Name of the Vulnerable Software and Affected Versions setuptools versions prior to 83.0.0 Description setuptools is a package used to download, build, install, upgrade, and uninstall Python packages. The FileList component fails to perform Unicode normalization when matching compiled glob pattern...

PYSEC-2026-1097 AIOHTTP vulnerable to brute-force leak of internal static file path components

Summary Path normalization for static files prevents path traversal, but opens up the ability for an attacker to ascertain the existence of absolute path components. Impact If an application uses web.static not recommended for production deployments, it may be possible for an attacker to ascertai...

GO-2026-5861 Probo has an open redirect bypass via path normalization in go.probo.inc/probo

Probo has an open redirect bypass via path normalization in go.probo.inc/probo...

DEBIAN-CVE-2026-14940

A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name RDN, the server can write past the end of a heap allocation while sorting RDN...

CVE-2026-14940

A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name RDN, the server can write past the end of a heap allocation while sorting RDN...

UBUNTU-CVE-2026-14940

A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name RDN, the server can write past the end of a heap allocation while sorting RDN...

PYSEC-2026-1385 Flask-CORS allows for inconsistent CORS matching

A vulnerability in corydolphin/flask-cors version 5.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquoteplus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path...

CVE-2026-14940

Affected software/component: 389 Directory Server (389-ds-base). Vulnerability: heap-buffer-overflow in DN normalization when processing a legacy-quoted value encoding a multivalued nested RDN, causing writes past the end of a heap allocation. Attack scenario: an unauthenticated remote attacker c...

CVE-2026-14940

A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name RDN, the server can write past the end of a heap allocation while sorting RDN...

EUVD-2026-42042

A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name RDN, the server can write past the end of a heap allocation while sorting RDN...

JLSEC-2026-655 Deno: Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)

Summary Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different...

PYSEC-2026-1455 Arbitrary HTML present after sanitization because of unicode normalization

Impact If using keeptypographicwhitespace=False which is the default, the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization. Patches The problem has been fixed in 2.4.2. Workarounds Se...

PYSEC-2026-1840 Pyramid static view path traversal up one directory

Impact This impacts users of Python 3.11 that are using a Pyramid static view with a full filesystem path and have a index.html file that is located exactly one directory above the location of the static view's file system path. No further path traversal exists, and the only file that could be...

Medium: python3.9

Issue Overview: The "tarfile" module would still apply normalization of AREGTYPE \x00 blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPELONGNAME or GNUTYPELONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other...

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Python vulnerabilities (USN-8509-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8509-1 advisory. It was discovered that Python incorrectly normalized paths in the tarfile module. An attacker could possibly use this issue to...

PT-2026-56194

Name of the Vulnerable Software and Affected Versions 389 Directory Server 389-ds-base affected versions not specified Description A heap-buffer-overflow occurs during the normalization of a Distinguished Name DN containing a legacy-quoted value that encodes a multivalued nested Relative...

Linux Distros Unpatched Vulnerability : CVE-2026-14940

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A heap-buffer-overflow flaw was found in 389 Directory Server 389-ds-base. When normalizing a Distinguished Name DN that contains a legacy-quoted value encoding...

Important: python3.14

Issue Overview: tarfile.extractall with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the...

USN-8509-1 python3.10, python3.12, python3.14 vulnerabilities

It was discovered that Python incorrectly normalized paths in the tarfile module. An attacker could possibly use this issue to bypass path restrictions. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. CVE-2025-13462 It was discovered that Python's HTMLParser incorrectly handled...