CVE-2026-107574

Inefficient algorithmic complexity in the JSON reader of Progressive Robot hMailServer allows a remote unauthenticated attacker to make the mail services unavailable. Reading a JSON object kept the first of each duplicated member name by searching the members already read, so an object of N...

CVE-2026-107572

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 ':matches' pattern was matched by a backtracking descent whose time grew with the match...

CVE-2026-107572

Progressive Robot hMailServer versions 6.2.24 through 6.3.5 are vulnerable to a Denial of Service (DoS) condition due to inefficient complexity in Sieve filter evaluation. The vulnerability arises from a backtracking descent during :matches pattern matching, where execution time grows exponential...

EUVD-2026-94856

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 ':matches' pattern was matched by a backtracking descent whose time grew with the match...

CVE-2026-107572 Inefficient Regular Expression Complexity in hMailServer

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 ':matches' pattern was matched by a backtracking descent whose time grew with the match...