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Medium 5.3Published Jan 26, 2026
CVE-2025-57783Improper header parsing may lead to request smuggling
Updated under an hour ago ()
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It affects Hiawatha Web server and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Improper header parsing may lead to request smuggling has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to access restricted resources managed by Hiawatha webserver.
- CVSS
- 5.3 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-444
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- certcc
- NVD analysis
- Analyzed
- Record last updated
- Jan 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Hiawatha Hiawatha Web server hiawatha:web_server (from the name) | 11.7 builds before 8.5 | CNA record |
hiawatha-webserver hiawatha hiawatha-webserver:hiawatha | 11.7 | NVD |
References
- https://gitlab.com/hsleisink/hiawatha/-/blame/master/src/http.c?ref_type=heads#L205product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.