by Kastro
Paper/Archive/CVE-2026-51785

CVE-2026-51785

mitre — An issue in Hugo Leisink Hiawatha v.12.1 and before allows a remote attacker to execute arbitrary code via a crafted request

EPSS 1%public exploitCVSS 9.8
critical.is priorityof 100
53
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 66.9.669 × 2013.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

An issue in Hugo Leisink Hiawatha v.12.1 and before allows a remote attacker to execute arbitrary code via a crafted request

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refrfc-editor.org/rfc/rfc9112.html#section-6.3refrfc-editor.org/rfc/rfc2616refrfc-editor.org/rfc/rfc2616.html#section-4.4exploitfenrisk.com/hiawatha-http-smuggling