CVE-2026-50643
MediumCVSS 5.1Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
8cc is vulnerable to an Out-of-Bounds Read due to improper handling of #line directives and GNU linemarkers. The compiler accepts attacker-controlled filename and line number metadata and later uses it without validation.
Risk Assessment
By supplying invalid or oversized line numbers, an attacker can trigger out-of-bounds memory access and a crash. This may result in loss of availability or data leakage.
Recommendation
It is recommended to update to the latest version of 8cc if available, and to monitor any information from the maintainers regarding this vulnerability.
Related vulnerabilities
- CVE-2026-109157Critical
The TRENDnet TEW-432BRP router version 3.10B20 contains a stack-based buffer overflow in the formTcpipSetup function of /goform/formTcpipSetup. Manipulating the Name argument allows remote attack, and the exploit has been publicly disclosed.
- CVE-2026-63354Critical
Affected devices do not properly validate and sanitize visual marker data contained in imported CSV trace files before rendering it on the Trace page. An attacker can socially engineer an authorized user with the 'Read diagnostics' right into importing a crafted trace file.
- CVE-2026-63353Critical
Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page. An attacker can socially engineer an authorized user with the 'Read diagnostics' right into importing a crafted trace file.
- CVE-2026-63350Critical
Affected devices do not properly restrict executable content contained in imported trace files. An attacker can socially engineer an authorized user with the 'Read diagnostics' right into importing a crafted trace file.
- CVE-2026-44415Critical
Affected systems do not properly restrict access to internal APIs and paths for authenticated users. An authenticated remote attacker could access sensitive internal information.
- CVE-2026-109110Critical
The Wavlink WL-WN592AX6 router version 250422 contains a vulnerability in the system function of the wmapd daemon component. Manipulation of an argument leads to OS command injection, and the attack can be launched remotely.
- CVE-2026-109109Critical
The Wavlink WL-WN530BE1-A router version 251117 contains a stack-based buffer overflow in the strcpy function of /cgi-bin/ExportAllSettings.cgi in the Settings Export CGI component. Manipulating the HTTP_COOKIE/X-Cmd argument allows remote attack.
- CVE-2026-109108Critical
The Wavlink WL-WN530BE1-A router version 251117 contains a vulnerability in the popen function of /cgi-bin/uploadVpn.cgi. Manipulating the Type argument leads to OS command injection, and the attack can be performed remotely.
- CVE-2026-108971Critical
A flaw has been found in D-Link DCS-930L B1.08B4 affecting the mpfd_decode function in bootloader_region.bin of the Emergency HTTP Recovery Server component. Manipulating the firmware argument leads to improper verification of the cryptographic signature. The attack can be performed remotely and the exploit has been published.
- CVE-2026-109758Critical
Perforce Helix Authentication Service (HAS) versions 2022.1-2025.2 retain a default SCIM bearer token that is not automatically replaced with a random value during installation. An attacker knowing this token can gain unauthorized access to the SCIM API and perform user and group operations. This issue can be chained with CVE-2026-61834, potentially leading to remote code execution.
Original NVD description (English source)
8cc is vulnerable to an Out‑of‑Bounds Read due to improper handling of #line directives and GNU linemarkers. The compiler accepts attacker-controlled filename and line number metadata and later uses it without validation when accessing source line arrays. By supplying invalid or oversized line numbers, an attacker can trigger out-of-bounds memory access and a crash. Maintainer of this project was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Version corresponding to the commit b480958 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS