CVE-2026-35355 | Uutils coreutils up to 0.5.x Install Utility toctou

VDB-359033 · CVE-2026-35355 · GCVE-0-2026-35355 UUTILS COREUTILS UP TO 0.5.X INSTALL UTILITY TOCTOU HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.9 $0-$5k 1.43+ Summaryinfo A vulnerability has been found in Uutils coreutils up to 0.5.x and classified as problematic. This issue affects some unknown processing of the component Install Utility. The manipulation leads to toctou. This vulnerability is listed as CVE-2026-35355. The attack must be carried out locally. There is no available exploit. The affected component should be upgraded. Detailsinfo A vulnerability was found in Uutils coreutils up to 0.5.x and classified as problematic. This issue affects an unknown part of the component Install Utility. The manipulation with an unknown input leads to a toctou vulnerability. Using CWE to declare the problem leads to CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. Impacted is integrity, and availability. The summary by CVE is: The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files. The weakness was presented by Zellic. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-35355 since 04/02/2026. The exploitation is known to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. Upgrading to version 0.6.0 eliminates this vulnerability. Productinfo Vendor Uutils Name coreutils Version 0.1 0.2 0.3 0.4 0.5 Website Product: https://github.com/uutils/coreutils/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.9 VulDB Meta Temp Score: 4.9 VulDB Base Score: 3.6 VulDB Temp Score: 3.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.3 CNA Vector (canonical): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Toctou CWE: CWE-367 / CWE-362 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: coreutils 0.6.0 Timelineinfo 04/02/2026 CVE reserved 04/22/2026 +20 days Advisory disclosed 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Researcher: Zellic Status: Confirmed CVE: CVE-2026-35355 (🔒) GCVE (CVE): GCVE-0-2026-35355 GCVE (VulDB): GCVE-100-359033 Entryinfo Created: 04/22/2026 19:05 Changes: 04/22/2026 19:05 (64) Complete: 🔍 Cache ID: 99:24C:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸