HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-66729 — facil.io through 0.7.6 contains an integer underflow vulnerability in the multip...

·Source: NIST NVD

Updated:

Executive Summary

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 t

Analysis

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. CVSS Score: 7.5. Published: 2026-07-27T17:16:42.517.

Indicators of Compromise (2)

CVE (1)
CVE-2026-66729
NVDMITRE CVE
Domain (1)
facil.io
VirusTotalURLhaus
Source Attribution

Originally published by NIST NVD on Jul 27, 2026. Verified by: NIST.

Related Threats

MEDIUMVulnerabilityNEW

BBVA acquires SocGen's 50% stake in brokerage joint venture Altura Markets

BBVA has reached an agreement with Société Générale (SG) to integrate Altura Markets into the BBVA Group by acquiring the 50 percent stake currently owned by the French bank, becoming the company's sole shareholder. The transaction is subject to the relevant regulatory approvals.

Finextra
MEDIUMVulnerabilityNEW

Chinese Threat Actor Uses Leaked DarkSword Kit to Deploy GHOSTBLADE on iOS

An unknown Chinese-threat actor has been observed running a campaign targeting Apple iOS devices by leveraging a publicly leaked version of the DarkSword exploit kit. Attack surface management platform Censys said it identified the threat actor running more than 100 web properties, most of which are fake Amazon Web Services (AWS) sign-in pages on a domain that also hosts the exploit toolkit. "

The Hacker News
MEDIUMVulnerabilityNEW

FCA streamlines transaction reporting obligations

Transaction reporting requirements become smarter, simpler and more proportionate under new rules from the FCA.

Finextra