CVE-2023-30188Public exploitNetwork attack vector

Service interruption via exposed native allocation functions

Published Aug 14, 2023 · Updated Jul 9, 2026

Memory exhaustion in ONLYOFFICE Document Server 4.0.3 through 7.3.2 allows remote attackers to interrupt service via crafted JavaScript. The doctrenderer V8 bridge exposes Save_AllocNative and Save_ReAllocNative to document JavaScript, letting untrusted code request repeated or oversized native allocations without a limiting guard. Unauthenticated network delivery of a crafted file is sufficient, and processing can exhaust server memory and make document services unavailable.

CVSS severity7.5
High
EPSS probability2.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in ONLYOFFICE Document Server 4.0.3 through 7.3.2 allows remote attackers to interrupt service via crafted JavaScript. The doctrenderer V8 bridge exposes Save_AllocNative and Save_ReAllocNative to document JavaScript, letting untrusted code request repeated or oversized native allocations without a limiting guard. Unauthenticated network delivery of a crafted file is sufficient, and processing can exhaust server memory and make document services unavailable.

The record

CVE
CVE-2023-30188
Published
Aug 14, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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