CVE-2025-57783

5.3 mediumEPSS 0.5%

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
Published: 2026-01-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

hiawatha-webserver:hiawatha

References

https://gitlab.com/hsleisink/hiawatha/-/blame/master/src/http.c?ref_type=heads#L205

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