What is CVE-2026-40517?

CVE-2026-40517 is a high-severity vulnerability in Radareorg Radare2, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-04-22.

How severe is CVE-2026-40517?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Radareorg Radare2

CVE-2026-40517

radare2 prior to 6.1.4 contains a command injection vulnerability in the PDB parser's print_gvars() function that allows attackers to execute arbitrary commands by crafting a malicious PDB file with newline characters in symbol names. Atta…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (7.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Radareorg Radare2 — versions 0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

blog.calif.io/p/mad-bugs-discovering-a-0-day-in-zero (technical-description, exploit)
github.com/radareorg/radare2/issues/25730 (issue-tracking)
github.com/radareorg/radare2/pull/25731 (patch)
www.vulncheck.com/advisories/radare2-command-injection-via-pdb-parser-symbol-na… (third-party-advisory)

Frequently asked questions

What is CVE-2026-40517?: CVE-2026-40517 is a high-severity vulnerability in Radareorg Radare2, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-04-22.
How severe is CVE-2026-40517?: High severity. CVSS v3 base score is 7.8 out of 10.