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CERT Polska disclosed three vulnerabilities in GNU cpio affecting versions through 2.15, tracked as CVE-2026-66484, CVE-2026-66485, and CVE-2026-66486. The issues were reported by researchers from the AFINE Team and include a path traversal flaw during tar extraction, an uncontrolled memory allocation bug that can trigger stack overflow and denial of service, and an improper output escaping weakness.
The output-handling flaw can allow forged archive listings or terminal escape-sequence injection, creating opportunities to mislead users or manipulate terminal output. CERT Polska said the vulnerabilities have been addressed in specific upstream commits, while a separate security notice amplified the disclosure and directed users to the CERT advisory for details on the affected GNU cpio software.
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CERT Polska disclosed three vulnerabilities affecting GNU cpio through version 2.15: a path traversal flaw in tar extraction, an uncontrolled memory allocation leading to stack overflow and denial of service, and improper output escaping that can enable forged listings or terminal escape-sequence injection.
The three GNU cpio vulnerabilities were fixed upstream in commits e2b9cbdd3354d2b1569b7390d1bc15c1930559ad, 3cd514031371d8aeeaf2048aa10103e02831aaa9, and 2ff9600c9ef32e88759843cdbde74c8db5ae9b30.
Michał Majchrowicz and Marcin Wyczechowski from the AFINE Team responsibly reported three vulnerabilities affecting GNU cpio to CERT Polska, which coordinated disclosure of the issues.
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CERT Polska disclosed three vulnerabilities in **GNU cpio** affecting versions through **2.15**, tracked as `CVE-2026-66484`, `CVE-2026-66485`, and `CVE-2026-66486`. The issues were reported by researchers from the **AFINE Team** and fixed in upstream commits. The most serious flaw allows **path traversal** during archive extraction, a weakness aligned with `CWE-22`, in which crafted file paths can escape the intended extraction directory and potentially overwrite or access files outside the restricted path. The additional bugs include an **uncontrolled memory allocation** issue mapped to `CWE-789` that can trigger a **stack overflow** and denial of service, and an **improper output escaping** flaw that can produce forged archive listings or inject terminal escape sequences. Together, the vulnerabilities expose users handling untrusted archives to file-system compromise, service disruption, and deceptive terminal output, underscoring the risk of insufficient pathname validation, unsafe memory handling, and unescaped archive metadata in command-line archive tools.
Aug 10, 2026
CERT Polska disclosed two vulnerabilities in **GNU coreutils**, tracked as `CVE-2026-56391` and `CVE-2026-56392`. The notice identifies the flaws as affecting the widely used GNU core utilities package, a foundational component on many Linux and Unix-like systems, and indicates the issues were reported to CERT Polska for publication. Public reporting on the vulnerabilities remains limited, with the available references providing only the identifiers and confirming that two separate flaws were documented. No technical root cause, affected version range, exploitation details, or mitigation guidance were included in the cited notices, leaving organizations that rely on GNU coreutils to monitor vendor and CERT updates for patch and exposure information.
Jul 24, 2026
Multiple newly disclosed vulnerabilities exposed **arbitrary file write** paths through symlink handling and path validation failures in developer and server-side software. In **Crawl4AI** before `0.8.8`, `CVE-2026-56258` affects screenshot and PDF endpoints by combining weak `output_path` validation, symlink following, and a **TOCTOU** race, allowing unauthenticated remote attackers to write files outside the intended directory and potentially reach code execution. In **Cursor Desktop** before `3.0`, `CVE-2026-50549` lets a malicious agent escape the workspace sandbox by forcing path canonicalization to fail and then abusing an in-workspace symlink to write arbitrary files under the user’s privileges, including paths that could enable later unsandboxed execution. A related pattern also appeared in archive extraction and privileged upload handling. The **extract-zip** package is affected by `CVE-2026-56876`, which fails to validate symlink targets inside ZIP archives, enabling path traversal outside the extraction directory and possible arbitrary file read or write when processing untrusted archives. Separately, **pwnlift** disclosed `CVE-2026-56815` in a privileged upload handler that could be abused for arbitrary file write **as root** through direct symlink following and a TOCTOU race; an initial fix was bypassable before a follow-up patch was merged, while one downstream deployment mitigated exposure by removing the privileged `sudo` entry. Together, the disclosures highlight recurring risk from incomplete path canonicalization, unsafe symlink handling, and containment checks in file-write workflows.
Jul 2, 2026