CVE-2025-26819Network attack vector

HTTP service interruption via unbounded response queues

Published Feb 14, 2025 · Updated Feb 18, 2025

Resource exhaustion in Monero 0.18.3.4 and earlier allows remote attackers to interrupt HTTP services via concurrent connections. The Epee HTTP server tracks neither queued response bytes nor per-address and global connection counts, allowing unread responses and connections to consume resources without effective bounds. The affected HTTP endpoint must be reachable; exhaustion can terminate connections and deny daemon or wallet RPC availability without compromising data.

CVSS severity8.6
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Monero 0.18.3.4 and earlier allows remote attackers to interrupt HTTP services via concurrent connections. The Epee HTTP server tracks neither queued response bytes nor per-address and global connection counts, allowing unread responses and connections to consume resources without effective bounds. The affected HTTP endpoint must be reachable; exhaustion can terminate connections and deny daemon or wallet RPC availability without compromising data.

The record

CVE
CVE-2025-26819
Published
Feb 14, 2025
Updated
Feb 18, 2025
Vendor
Monero Project
Product
Monero
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=0 <ec74ff4a3d3ca38b7912af680209a45fd1701c3d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Monero Project · Moneroversion=0 <ec74ff4a3d3ca38b7912af680209a45fd1701c3d

Published CVSS scores

8.6MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.5NIST NVDCVSS: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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