CVE-2026-28691Network attack vector

Service crash via unchecked JBIG decode failure

Published Mar 9, 2026 · Updated Mar 9, 2026

Uninitialized pointer access in ImageMagick before 7.1.2-16 and 6.9.13-41 allows remote attackers to crash image-processing services. ReadJBIGImage continues after jbg_dec_in returns a decoding error, then uses decoder state that lacks an initialized image pointer. Processing a crafted JBIG image without privileges or user interaction is sufficient; the documented consequence is service interruption, not data access or modification.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Uninitialized pointer access in ImageMagick before 7.1.2-16 and 6.9.13-41 allows remote attackers to crash image-processing services. ReadJBIGImage continues after jbg_dec_in returns a decoding error, then uses decoder state that lacks an initialized image pointer. Processing a crafted JBIG image without privileges or user interaction is sufficient; the documented consequence is service interruption, not data access or modification.

The record

CVE
CVE-2026-28691
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-252, CWE-824, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.9.13-41
  2. Affected versionversion=>= 7.0.0, < 7.1.2-16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=< 6.9.13-41; version=>= 7.0.0, < 7.1.2-16

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-252Unchecked Return Value
CWE-824Access of Uninitialized Pointer
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo