# CVE-2026-123273: ImageMagick before 7.1.2-35 and 6.9.13-60 Infinite Loop via SVG Decoder

Status: published. Published: 2026-11-05. Updated: 2026-11-09.

ImageMagick before 7.1.2-35 and 6.9.13-60 contains an infinite loop vulnerability in the SVG decoder because QueueAuthenticPixelCacheNexus in MagickCore/cache.c fails to validate requested region width and height. Attackers can supply a crafted SVG image that repeatedly requests a non-advancing pixel region, consuming CPU and hanging the decoding worker.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/ImageMagick/ImageMagick/commit/c5f2c6c9fb1458f960a506691c9351e9da6d2247
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/ImageMagick/ImageMagick6/commit/712e523e7f746d35c963b78555e1c24364a9426e

## Affected products and versions

- ImageMagick / ImageMagick (imagemagick/imagemagick): ≥ 7.0.0; < 7.1.2-35 (affected, custom); ≥ 0; < 6.9.13-60 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: CNA: VulnCheck

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.34% as of 2026-11-09; percentile 28.08%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-835

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-q66g-3m63-78mh (CNA: VulnCheck; vendor-advisory)

- https://github.com/ImageMagick/ImageMagick/commit/c5f2c6c9fb1458f960a506691c9351e9da6d2247 (CNA: VulnCheck; patch)

- https://github.com/ImageMagick/ImageMagick6/commit/712e523e7f746d35c963b78555e1c24364a9426e (CNA: VulnCheck; patch)

- https://github.com/ImageMagick/ImageMagick/blob/3a9639c0bd21f61f22fcce4c5f6838f1f0d8f738/MagickCore/cache.c#L4348 (CNA: VulnCheck; technical-description)

- https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-35 (CNA: VulnCheck; release-notes)

- https://github.com/ImageMagick/ImageMagick6/releases/tag/6.9.13-60 (CNA: VulnCheck; release-notes)

- https://www.vulncheck.com/advisories/imagemagick-before-7.1.2-35-and-6.9.13-60-infinite-loop-via-svg-decoder (CNA: VulnCheck; third-party-advisory)

- https://github.com/ImageMagick/ImageMagick/blob/3a9639c0bd21f61f22fcce4c5f6838f1f0d8f738/MagickCore/cache.c#L4348 (disclosure@vulncheck.com)

- https://github.com/ImageMagick/ImageMagick/commit/c5f2c6c9fb1458f960a506691c9351e9da6d2247 (disclosure@vulncheck.com)

- https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-35 (disclosure@vulncheck.com)

- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-q66g-3m63-78mh (disclosure@vulncheck.com)

- https://github.com/ImageMagick/ImageMagick6/commit/712e523e7f746d35c963b78555e1c24364a9426e (disclosure@vulncheck.com)

- https://github.com/ImageMagick/ImageMagick6/releases/tag/6.9.13-60 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/imagemagick-before-7.1.2-35-and-6.9.13-60-infinite-loop-via-svg-decoder (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-123273; retrieved 2026-11-09; source updated 2026-11-09

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123273; retrieved 2026-11-10; source updated 2026-11-09

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-123273; retrieved 2026-11-09; source updated Not reported

Revision: bd02b580af6a81b9642e9e2795dfc5b16093e434d95b015f4a536295e83c474c

Canonical: https://y2.dev/cve/CVE-2026-123273

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