CVE-2026-40527Public exploit

Shell command execution via unsanitized DWARF parameter names

Published Apr 17, 2026 · Updated Apr 17, 2026

Command injection in radare2 before commit bc5a890 allows attackers to execute shell commands by analyzing a crafted ELF file. print_fcn_arg inserts an unsanitized DW_TAG_formal_parameter name from the type database into a pfq command string, where the |! operator invokes the shell. Execution requires analysis with aaa followed by afsvj at the crafted call site, and commands run with the radare2 user's privileges.

CVSS severity8.5
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in radare2 before commit bc5a890 allows attackers to execute shell commands by analyzing a crafted ELF file. print_fcn_arg inserts an unsanitized DW_TAG_formal_parameter name from the type database into a pfq command string, where the |! operator invokes the shell. Execution requires analysis with aaa followed by afsvj at the crafted call site, and commands run with the radare2 user's privileges.

The record

CVE
CVE-2026-40527
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
radareorg
Product
radare2
Classifications
CWE-78, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <bc5a89033db3ecb5b1f7bf681fc6ba4dcfc14683

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

radareorg · radare2version=0 <bc5a89033db3ecb5b1f7bf681fc6ba4dcfc14683

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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