---
id: CVE-2026-63501
title: >-
  ag-psd: Uncontrolled Memory Allocation in PSD Layer Decoding (totalMemoryLimit
  bypass)
summary: >-
  ag-psd is a JavaScript library for reading and writing Photoshop Document
  files. Prior to 31.0.3, readPsd() accepts a totalMemoryLimit for parsing
  untrusted PSD files, but decodeLayerImageData expects a differently named
  memoryLimit prop…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: Agamnentzar
product: ag-psd
affected:
  - ag-psd < 31.0.1
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-03T21:31:51.692243Z'
exploitAvailable: true
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T21:32:16.967Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-63501'
references:
  - url: >-
      https://github.com/Agamnentzar/ag-psd/security/advisories/GHSA-6w3r-6hpr-hp6p
    label: >-
      https://github.com/Agamnentzar/ag-psd/security/advisories/GHSA-6w3r-6hpr-hp6p
  - url: >-
      https://github.com/Agamnentzar/ag-psd/commit/57ea7d865238b6b7c8a2e976bcf2a77e03116e2f
    label: >-
      https://github.com/Agamnentzar/ag-psd/commit/57ea7d865238b6b7c8a2e976bcf2a77e03116e2f
  - url: 'https://github.com/Agamnentzar/ag-psd/releases/tag/31.0.3'
    label: 'https://github.com/Agamnentzar/ag-psd/releases/tag/31.0.3'
tags:
  - cve.org
  - exploit-available
epss: 0.0051
epssPercentile: 0.43742
ingestedAt: '2026-11-05T20:33:06.528Z'
---

## Overview

ag-psd is a JavaScript library for reading and writing Photoshop Document files. Prior to 31.0.3, readPsd() accepts a totalMemoryLimit for parsing untrusted PSD files, but decodeLayerImageData expects a differently named memoryLimit property and therefore passes an undefined limit to createImageDataBitDepth. An attacker who can supply a PSD to an application with layer decoding enabled can use attacker-controlled layer dimensions to trigger an allocation larger than the configured limit, causing process memory exhaustion and denial of service. The advisory also identifies inflateSync(compressed) decompressing ZIP-encoded channel data without an output-size cap, which can cause a similar denial of service through unbounded decompression. This vulnerability is fixed in 31.0.1.

## Affected

- `ag-psd < 31.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.