CVE-2026-92987Public exploitNetwork attack vectorHinoki check available

CPU exhaustion via quadratic XML attribute validation

Published Sep 17, 2026 · Updated Sep 24, 2026

Denial of service in RazrFalcon roxmltree 0.21.1 and earlier allows remote attackers to exhaust CPU by supplying crafted XML. Document::parse linearly scans previously accepted attributes for every new attribute and repeats linear namespace-deduplication work, producing quadratic runtime. The condition requires a consuming application to parse attacker-controlled XML; a successful request pins a CPU core and interrupts that consumer.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in RazrFalcon roxmltree 0.21.1 and earlier allows remote attackers to exhaust CPU by supplying crafted XML. Document::parse linearly scans previously accepted attributes for every new attribute and repeats linear namespace-deduplication work, producing quadratic runtime. The condition requires a consuming application to parse attacker-controlled XML; a successful request pins a CPU core and interrupts that consumer.

The record

CVE
CVE-2026-92987
Published
Sep 17, 2026
Updated
Sep 24, 2026
Vendor
RazrFalcon
Product
roxmltree
Classifications
CWE-1050, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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?

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

  1. Affected versionversion=0 <=0.21.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RazrFalcon · roxmltreeversion=0 <=0.21.1

Published CVSS scores

7.5Red HatCVSS: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1050Excessive Platform Resource Consumption within a Loop
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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Technologies

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