CVE-2026-107575
- Source
- https://cve.org/CVERecord?id=CVE-2026-107575
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107575.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-107575
- Published
- 2026-10-08T11:46:46Z
- Modified
- 2026-10-10T02:47:27Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- Inefficient Algorithmic Complexity in hMailServer
- Details
-
Inefficient algorithmic complexity in the SPF macro expansion of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to consume worker-thread time by publishing a crafted SPF record. RFC 7208 section 7.1 requires a name too long to look up to lose whole labels from the left; the server did this by removing one label at a time and copying the rest of the name each time, so the work grew with the square of the expansion. An attacker who publishes an SPF record for a domain they control, with a mechanism whose domain-spec expands through macros to a name far longer than 253 characters, makes the SPF check of a message from that domain take several seconds. The expansion is bounded by SPF's own per-term and per-macro limits, so the loss of availability is partial.
- Database specific
{ "cna_assigner": "GitLab", "cwe_ids": [ "CWE-407" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107575.json" }- References