https://db.gcve.eu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sun, 11 Oct 2026 14:10:43 +0000 https://db.gcve.eu/vuln/cve-2026-107572 <p><strong>Affected:</strong> Progressive Robot Ltd hMailServer</p> <p>Inefficient complexity in the Sieve filter evaluation of Progressive Robot hMailServer 6.2.24 through 6.3.5 allows an authenticated account holder to make the mail services unavailable with their own filter. A &#39;:matches&#39; pattern was matched by a backtracking descent whose time grew with the matched value&#39;s length raised to the number of wildcards, so a pattern such as &#39;*a*a*a*b&#39; over 800 characters took 44 seconds; and &#39;deleteheader&#39; erased the fields it removed one at a time, so removing many fields of one name over a message&#39;s header cost O(N^2) (80,000 fields took 18.8 seconds). Sieve filters run on the small, shared delivery thread pool, so an account holder whose active script does this, fed a few messages they can send themselves, empties the pool and stops delivery for the whole server. The script is the account holder&#39;s own and cannot be set for another user.</p> <p><strong>Affected:</strong> Progressive Robot Ltd hMailServer</p> <p>Inefficient complexity in the Sieve filter evaluation of Progressive Robot hMailServer 6.2.24 through 6.3.5 allows an authenticated account holder to make the mail services unavailable with their own filter. A &#39;:matches&#39; pattern was matched by a backtracking descent whose time grew with the matched value&#39;s length raised to the number of wildcards, so a pattern such as &#39;*a*a*a*b&#39; over 800 characters took 44 seconds; and &#39;deleteheader&#39; erased the fields it removed one at a time, so removing many fields of one name over a message&#39;s header cost O(N^2) (80,000 fields took 18.8 seconds). Sieve filters run on the small, shared delivery thread pool, so an account holder whose active script does this, fed a few messages they can send themselves, empties the pool and stops delivery for the whole server. The script is the account holder&#39;s own and cannot be set for another user.</p> https://db.gcve.eu/vuln/cve-2026-107572