PatchTheCVEhiawatha vulnerabilities and fixes
Recent CVEs affecting hiawatha, with upgrade or downgrade steps. 2 tracked.
hiawatha has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2026-01-26. Highest priority: CVE-2025-57783 (score 34/100).
- CVE-2025-57784 LOW 3.3 DOWNGRADE Tomahawk auth timing attack due to usage of `strcmp` has been identified in Hiawatha webserver version 11.7 wh
- CVE-2025-57783 MEDIUM 5.3 DOWNGRADE Improper header parsing may lead to request smuggling has been identified in Hiawatha webserver version 11.7 w
FAQ
How do I fix hiawatha vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is hiawatha being exploited right now?
None of the tracked hiawatha CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which hiawatha CVE should I patch first?
CVE-2025-57783 currently ranks highest (34/100): Improper header parsing may lead to request smuggling has been identified in Hiawatha webserver version 11.7 w.