Security readout for executives and security teams
Plain-English summary
ImageMagick versions before 7.1.2-15 can leak memory when writing ASHLAR images. A crafted image could make an exposed image-processing service consume process memory and reduce availability. The issue is not listed as KEV, and the bundle does not cite active exploitation.
Executive priority
Schedule remediation in the normal vulnerability patch cycle, faster for internet-facing or customer-upload image services. Business impact is primarily service degradation, not data theft or tampering based on current sources.
Technical view
CVE-2026-25637 is a CWE-401 memory leak in the ASHLAR image writer. Crafted input can leave small allocations unreleased. CVSS is 5.3 with network attack vector, low complexity, no privileges, no user interaction, and low availability impact. Version 7.1.2-15 contains the patch.
Likely exposure
Exposure is most likely where ImageMagick before 7.1.2-15 processes untrusted images or performs ASHLAR writing in web, API, queue, or batch workflows. The provided affected list names ImageMagick only.
Exploitation context
The sources describe denial-of-service potential through memory exhaustion. They do not provide evidence of active exploitation, public weaponization, or CISA KEV listing. Treat this as availability risk for reachable image-processing paths.
Researcher notes
The advisory, CVE data, and commit support a patched memory leak in the ASHLAR encoder. The bundle does not establish exploit activity or affected downstream products beyond ImageMagick. Magick.NET is referenced, but affected product data only names ImageMagick.
Mitigation direction
- Upgrade ImageMagick to version 7.1.2-15 or later.
- Check vendor guidance for downstream packages and distribution-specific fixes.
- Restrict untrusted image processing where ASHLAR output is unnecessary.
- Apply resource limits around image conversion workers.
- Monitor image-processing services for abnormal memory growth.
Validation and detection
- Inventory deployed ImageMagick versions across servers, containers, and build images.
- Identify workflows that accept untrusted image files.
- Confirm whether ASHLAR writing is enabled or reachable.
- Verify patched version 7.1.2-15 or later in runtime environments.
- Review logs and metrics for memory exhaustion incidents.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
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CWE-401: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-25637 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (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:L
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.
SSVC decision data
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4GitHub_MVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-gm37-qx7w-p258CVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/ImageMagick/ImageMagick/commit/30ce0e8efbd72fd6b50ed3a10ae22f57c8901137CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3CVE reference, GitHub_M · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.