{"cve":"CVE-2026-35347","nvd":{"published":"2026-04-22T17:16:36.903","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","score":4.4},"cwes":["CWE-20"],"references":["https://github.com/uutils/coreutils/pull/9545","https://github.com/uutils/coreutils/releases/tag/0.6.0","https://github.com/uutils/coreutils/pull/9545"],"products":["uutils:coreutils"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-35347","score":0.00135,"percentile":0.0292,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-3wfc-mgpm-9rq6","url":"https://osv.dev/vulnerability/GHSA-3wfc-mgpm-9rq6","summary":"comm: FIFO/pipe inputs are drained before comparison (data loss / hang)","modified":"2026-07-06T20:41:08.211382Z","packages":[{"ecosystem":"crates.io","name":"uu_comm","purl":"pkg:cargo/uu_comm","ranges":["<0.6.0"],"fixed":["0.6.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}