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Unrated severityOSV Advisory· Published Jan 26, 2026· Updated Jan 26, 2026

Improper header parsing may lead to request smuggling

CVE-2025-57783

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Hiawatha/HiawathaOSV2 versions
    9.3.1, v10.0, v10.1, …+ 1 more
    • (no CPE)range: 9.3.1, v10.0, v10.1, …
    • (no CPE)range: = 11.7

Patches

Vulnerability mechanics

News mentions

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