CVE-2026-85715 PUBLISHED

ExifReader: DoS via Crafted HEIC/AVIF iloc Box - Memory Exhaustion

Assigner: GitHub_M
Reserved: 04.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

Vendor mattiasw
Product ExifReader
Versions
  • Version < 4.41.1 is affected

References

Problem Types

  • CWE-789: Memory Allocation with Excessive Size Value CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') CWE