CVE-2025-65942Network attack vector

Denial of service via unbounded Snappy decoding

Published Nov 25, 2025 · Updated Nov 26, 2025

Denial of service in VictoriaMetrics allows remote authenticated users to exhaust process memory by submitting malformed Snappy blocks. The ingest path passes an attacker-controlled decoded-length header to the Snappy decoder without enforcing the configured maximum request size, permitting excessive allocation. Reachability requires high-privilege access to an ingest API; affected releases span 1.0.0 through 1.110.22, 1.111.0 through 1.122.7, and 1.123.0 through 1.129.0, and the resulting out-of-memory condition can destabilize the service.

CVSS severity2.7
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in VictoriaMetrics allows remote authenticated users to exhaust process memory by submitting malformed Snappy blocks. The ingest path passes an attacker-controlled decoded-length header to the Snappy decoder without enforcing the configured maximum request size, permitting excessive allocation. Reachability requires high-privilege access to an ingest API; affected releases span 1.0.0 through 1.110.22, 1.111.0 through 1.122.7, and 1.123.0 through 1.129.0, and the resulting out-of-memory condition can destabilize the service.

The record

CVE
CVE-2025-65942
Published
Nov 25, 2025
Updated
Nov 26, 2025
Vendor
VictoriaMetrics
Product
VictoriaMetrics
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.0.0, < 1.110.23
  2. Affected versionversion=>= 1.111.0, < 1.122.8
  3. Affected versionversion=>= 1.123.0, < 1.129.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

VictoriaMetrics · VictoriaMetricsversion=>= 1.0.0, < 1.110.23; version=>= 1.111.0, < 1.122.8; version=>= 1.123.0, < 1.129.1

Published CVSS scores

2.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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