CVE-2026-22809
tarteaucitron.js has Regular Expression Denial of Service (ReDoS) vulnerability
描述
## Summary A potential Regular Expression Denial of Service (ReDoS) vulnerability was identified in tarteaucitron.js in the handling of the `issuu_id` parameter. ## Details The issue was caused by the use of insufficiently constrained regular expressions applied to attacker-controlled input: if (issuu_id.match(/\d+\/\d+/)) { issuu_embed = '#' + issuu_id; } else if (issuu_id.match(/d=(.*)&u=(.*)/)) { issuu_embed = '?' + issuu_id; } These expressions are not anchored and rely on greedy patterns (`.*`). When evaluated against specially crafted input, they may cause excessive backtracking, leading to high CPU consumption and potential denial of service. ## Impact An attacker able to control the `issuu_id` parameter could exploit this vulnerability to degrade performance or cause temporary service unavailability through CPU exhaustion. No confidentiality or integrity impact was identified. ## Fix https://github.com/AmauriC/tarteaucitron.js/commit/f0bbdac2fdf3cd24a325fc0928c0d34abf1b7b52 The logic was simplified and hardened by removing ambiguous regular expressions and enforcing strict input validation: if (issuu_id.match(/^\d+\/\d+$/)) { issuu_embed = '#' + issuu_id; } else { issuu_embed = '?' + issuu_id; } This change eliminates the risk of catastrophic backtracking and prevents ReDoS conditions. Additionally, code related to the legacy "Alexa Rank" service was removed. This service, historically provided by Alexa.com via browser toolbars and popularity rankings, has been deprecated for several years and is no longer operational. The Alexa domain is now exclusively associated with the Amazon voice assistant, and the original ranking service has been permanently discontinued.
如何修補 CVE-2026-22809
要修補 CVE-2026-22809,請將受影響套件升級到下列已修補版本。
- —升級至 1.29.0 或更新版本
CVE-2026-22809 正在被利用嗎?
低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。