VulnerabilityPublished 13 Nov 2026

CVE-2026-62297: ag-psd can exhaust memory when parsing crafted PSD dimensions

Affects ag-psdSource GCVE Database

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Authoritative record:CVE-2026-62297· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 31.0.0 soon.

Data as of 14 Nov 2026, 01:05 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (GitHub_M)	CVSS 3.1	7.5

Patch: Available – fixed in 31.0.0

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade ag-psd to 31.0.0.

Affected software

Product	Affected	Fixed in
npmag-psd	Affected <31.0.0	Fixed in 31.0.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

### Summary readPsd() commits the image/layer buffers from the declared header geometry (width x height x channels x depth, and per-layer rectangles) before validating those values against the actual data. A tiny crafted PSD declaring huge geometry forces a multi-gigabyte allocation. ### Impact On ag-psd 30.2.0, Node 24, a 52-byte PSD makes readPsd(buf) commit ~3.17 GB (measured peak RSS) in ~0.45 s before throwing a catchable RangeError ("Offset is outside the bounds of the DataView") — about 61,000,000x amplification. Because the buffer is committed before validation, the allocation OOM-kills the process before the error on essentially any host (uncatchable), and concurrent requests exhaust memory. Any service reading untrusted PSDs with ag-psd is exposed to a remote DoS. This is distinct from #39 and #206, which involve genuinely large PSDs (memory proportional to real data). Here the input is 52 bytes: the file declares enormous geometry that is never present, so the allocation is driven by an unvalidated header field, not by actual content, an uncontrolled-allocation denial-of-service vulnerability, not proportional memory use. ### Steps to reproduce The PoC is a 52-byte PSD (sha256 a1146a6fabdfef289472f99a56851249e7a46e8d19d4d8bf85fe833e2f0158b6). Reconstruct with: base64 -d > poc.psd <<'EOF' OEJQUwABAAAAAAAAAA0AADcuAAA58wAgAAMAAAAAAAAAAAAAAAAAAdEgNZv+i9bc9ygd2A== EOF Then (commits ~3.17 GB before throwing a catchable RangeError): const { readPsd } = require('ag-psd'); const buf = require('fs').readFileSync('poc.psd'); readPsd(buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength)); ### Root cause psdReader.js sizes the off-heap typed-array buffers from the declared header dimensions (and per-layer rectangles, a second independent lever) before validating against the available bytes. ### Suggested fix Validate the declared dimensions, channel count, depth, and per-layer rectangles against the actual input length (and a sane maximum) before allocating.

CWE-789Memory Allocation with Excessive Size Value (opens in a new tab)
Variant weakness
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
Implementation · Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
OWASP ASVS 4.0.3
V8.1.4 (opens in a new tab)
V13.4.1 (opens in a new tab)
V11.1.4 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

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Affected software

Description

WeaknessesCWE-789

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