ebookmeta XML External Entity vulnerability

published 2024-06-07 2 y ago modified 2026-07-07 4 mo ago also GHSA-hx54-pf28-7xch , PYSEC-2026-1324 , EUVD-2024-2082

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

An XML External Entity (XXE) vulnerability in the ebookmeta.get_metadata function of lxml before v4.9.1 allows attackers to access sensitive information or cause a Denial of Service (DoS) via crafted XML input.

Patch / fix

fixed in 2

pypi ebookmeta 1.2.8
lxml lxml 4.9.1

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-10-30)

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
OSV	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
GitHub	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	ebookmeta	<1.2.8	1.2.8

Affected products

lxml lxml

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference
CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

github.com /dnkorpushov/ebookmeta/issues/16#issue-2317712335
web, issue-tracking
nvd.nist.gov /vuln/detail/CVE-2024-37388
advisory
github.com /dnkorpushov/ebookmeta
package
pypi.org /project/ebookmeta
package
github.com /advisories/GHSA-hx54-pf28-7xch
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary