CVE-2026-31247Network attack vector

Service interruption via recursive XML entity expansion

Published May 11, 2026 · Updated May 11, 2026

XML entity expansion in Docling 2.61.0 and earlier allows remote attackers to interrupt service by submitting crafted JATS XML. The JATS backend passes untrusted XML to etree.parse() without disabling entity resolution, so recursively nested entities expand exponentially. Reachability requires an application to accept attacker-supplied JATS XML; processing needs no authentication or user interaction and consumes resources until service is interrupted.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML entity expansion in Docling 2.61.0 and earlier allows remote attackers to interrupt service by submitting crafted JATS XML. The JATS backend passes untrusted XML to etree.parse() without disabling entity resolution, so recursively nested entities expand exponentially. Reachability requires an application to accept attacker-supplied JATS XML; processing needs no authentication or user interaction and consumes resources until service is interrupted.

The record

CVE
CVE-2026-31247
Published
May 11, 2026
Updated
May 11, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHubCVSS: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-400Uncontrolled Resource Consumption
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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