{"id":12190,"date":"2026-09-04T18:54:10","date_gmt":"2026-09-04T10:54:10","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-81722"},"modified":"2026-09-04T18:54:10","modified_gmt":"2026-09-04T10:54:10","slug":"cve-2026-81722","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-81722","title":{"rendered":"CVE-2026-81722 [HIGH] &#8211; nltk PorterStemmer in versions"},"content":{"rendered":"<p>nltk PorterStemmer in versions &lt;= 3.10.2 (fixed in 3.10.3) contains an inefficient-algorithmic-complexity denial of service in PorterStemmer.stem(). The _is_consonant() helper walks backward over the entire run of trailing &#039;y&#039; characters on every call, and _measure() invokes it for each stem position, causing O(n^2) behavior. A single ~20-50 KB untrusted token consisting of a long run of the letter &#039;y&#039; followed by a matching suffix (e.g., &#039;ness&#039;) can pin a CPU core for seconds to minutes, causing availability impact.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>nltk PorterStemmer in versions<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-12190","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/12190","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}