EUVD-2026-81897
GHSA-pj96-35fp-cfcc
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Unauthenticated, low-complexity parsing of a network-delivered image causes process crash; availability-only impact with no confidentiality or integrity effect, matching the vendor vector.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
6DescriptionCVE.org
ExifReader is a JavaScript Exif information parser. Prior to 4.41.1, ExifReader parses attacker-controlled HEIC or AVIF ISO-BMFF files in getItems() within src/image-header-iso-bmff-iloc.js and trusts iloc itemCount and extentCount values while allocating an extent object for every nested-loop iteration. When offsetSize, lengthSize, baseOffsetSize, and indexSize are zero, the extent fields consume no input bytes and the buffer offset does not advance, but the parser can still allocate up to itemCount multiplied by extentCount objects without an allocation budget. A small malicious iloc box can therefore cause hundreds of megabytes of heap growth or exhaust system memory, terminating a Node.js process and denying service to web, desktop, or mobile applications that parse untrusted images. The zero field widths are valid ISO-BMFF values indicating absent fields, so the vulnerable parser must bound work rather than relying on offset advancement. The issue is fixed in version 4.41.1.
AnalysisAI
Improper memory allocation control in ExifReader before 4.41.1 allows remote attackers to exhaust heap memory and terminate the host Node.js process by supplying a crafted HEIC or AVIF (ISO-BMFF) image for metadata parsing. The flaw is unauthenticated and requires no user interaction beyond the target application passing attacker-controlled image data to the library - a small malicious iloc box can allocate hundreds of megabytes of objects, producing a denial of service (CWE-789, CVSS 7.5, availability-only impact). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitable whenever an application passes attacker-controlled HEIC or AVIF (ISO-BMFF) images to ExifReader versions prior to 4.41.1 for metadata parsing - no authentication, user interaction, or non-default configuration is required beyond the act of parsing untrusted images. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine, easily-triggered denial-of-service issue, but not a top-tier emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to ExifReader 4.41.1 or later - the vendor-released patch that adds bounding of iloc extent allocation work; the release is at https://github.com/mattiasw/ExifReader/releases/tag/v4.41.1, the fix commit is https://github.com/mattiasw/ExifReader/commit/17b901cd192d2c90d7f9f347bd3073b28b482699, and the advisory is https://github.com/mattiasw/ExifReader/security/advisories/GHSA-pj96-35fp-cfcc. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every application, microservice, and build artifact that bundles ExifReader at a version below 4.41.1, including transitive dependencies, and treat the upgrade to 4.41.1 (or later) as the primary fix despite the advisory tracking field listing patch status as not available - confirm the 4.41.1 release with the vendor before relying on it. …
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