CVE-2025-46726Public exploitNetwork attack vector

File disclosure and crashes via unsafe XML parsing

Published May 5, 2025 · Updated May 5, 2025

XXE injection in Langroid before 0.53.4 allows remote attackers to read local files or crash LLM applications via crafted XML. XMLToolMessage.extract_field_values passes the supplied string to lxml.etree.fromstring with a default XMLParser that resolves entities and permits DTD processing. Any LLM application that routes attacker-controlled XML into this class exposes readable host files and can exhaust memory through quadratic entity expansion.

CVSS severity9.1
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE injection in Langroid before 0.53.4 allows remote attackers to read local files or crash LLM applications via crafted XML. XMLToolMessage.extract_field_values passes the supplied string to lxml.etree.fromstring with a default XMLParser that resolves entities and permits DTD processing. Any LLM application that routes attacker-controlled XML into this class exposes readable host files and can exhaust memory through quadratic entity expansion.

The record

CVE
CVE-2025-46726
Published
May 5, 2025
Updated
May 5, 2025
Vendor
Langroid
Product
Langroid
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2025CVE publishedPublication date reported by the CVE source.
  2. May 5, 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=< 0.53.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Langroid · Langroidversion=< 0.53.4

Published CVSS scores

7.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1190Exploit Public-Facing Application

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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