EUVD-2026-49358
GHSA-g2qx-6r8w-37px
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK
1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 27, 2026
Remote denial-of-service in facil.io through version 0.7.6 allows unauthenticated attackers to crash worker processes by sending a crafted POST request with an empty Content-Disposition header field name. A public proof-of-concept exploit exists. The integer underflow in http_mime_parser.h causes an out-of-bounds memory read and bus fault, resulting in immediate server disruption.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Primary rating from Vendor (VulnCheck) · only source for this CVE.
CVSS VectorVendor: VulnCheck
DescriptionCVE.org
facil.io through 0.7.6 contains an integer underflow vulnerability in the multipart MIME body parser that allows unauthenticated remote attackers to crash the server process by sending a crafted Content-Disposition header with an empty field name. Attackers can trigger a uint32_t wraparound in http_mime_parser.h causing an out-of-bounds memory read past the name pointer, resulting in a bus fault that crashes the handling worker with a single POST request.
Latest POC
1 PoC candidate from github (unverified)
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Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Denial-of-service in facil.io HTTP/1.1 chunked transfer encoding parser allows remote unauthenticated attackers to crash
Denial-of-service in facil.io 0.6.0 through 0.7.6 permits unauthenticated remote attackers to permanently disable the se
Path traversal in boazsegev facil.io up to version 0.7.58 allows remote unauthenticated attackers to read files outside
Remote unauthenticated denial of service affects facil.io (all versions prior to commit 5128747) and iodine (all version
Exploit-DB