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CVE Record

CVE-2026-33908: ImageMagick is vulnerable to Stack Overflow in DestroyXMLTree()

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, Magick frees the memory of the XML tree via the `DestroyXMLTree()` function; however, this process is executed recursively with no depth limit imposed. When Magick processes an XML file with deeply nested structures, it will exhaust the stack memory, resulting in a Denial of Service (DoS) attack. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

ImageMagick can be crashed when it processes a deeply nested XML file. The issue affects versions before 6.9.13-44 and 7.1.2-19. The business impact is denial of service in systems that rely on ImageMagick for image or XML-related processing, especially where users can upload or submit files.

Executive priority

Treat this as a high-priority availability risk for public upload and file-processing services. Patch promptly, but escalation should focus on exposed processing pipelines rather than broad emergency response.

Technical view

The vulnerability is uncontrolled recursion in DestroyXMLTree() while freeing XML trees. A deeply nested XML structure can exhaust stack memory and terminate processing. CVSS 3.1 is 7.5 for network-reachable, unauthenticated availability impact. The listed CWEs are CWE-674 and CWE-776.

Likely exposure

Exposure is most likely in web applications, automation pipelines, or services that invoke vulnerable ImageMagick versions on user-supplied or externally sourced files.

Exploitation context

The source bundle does not show KEV listing or confirmed active exploitation. The known impact is denial of service, not data theft or code execution, based on the provided advisory data.

Researcher notes

Evidence supports stack exhaustion through recursive XML tree destruction. Do not assume code execution or active exploitation from the provided sources. Confirm downstream package status separately because distribution backports may not match upstream version numbers.

Mitigation direction

  • Upgrade ImageMagick to 6.9.13-44, 7.1.2-19, or later.
  • Prioritize systems that process files from untrusted users or external feeds.
  • Check vendor and distribution guidance for packaged ImageMagick builds.
  • Temporarily restrict untrusted XML or image processing where upgrades need scheduling.

Validation and detection

  • Inventory ImageMagick versions across hosts, containers, and build images.
  • Confirm no deployed ImageMagick is below 6.9.13-44 or 7.1.2-19.
  • Map application paths that pass external files into ImageMagick.
  • Review SBOMs and dependency manifests for bundled or transitive ImageMagick use.
Prepared
Confidence
high
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-674: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-776: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-33908 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6GitHub_M
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-33908Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPImageMagick: Magick.NET: ImageMagick: Denial of Service via deeply nested XML file processing
other:Red Hat severity ratingcvssV3_1
  • 2026-04-13T22:01:09.266Z: Reported to Red Hat.
  • 2026-04-13T21:06:42.682Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ImageMagickImageMagick< 6.9.13-44, < 7.1.2-19Listed
Weakness

CWE details

CWE-674CWE-776

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-674 · source CWE mapping

Uncontrolled Recursion

Uncontrolled Recursion represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs
CWE-776 · source CWE mapping

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs