CVE-2024-28757

HIGHNVD 7.57.5—

7.5

libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 79.2%
KEV: Not listed

Published

March 10, 2024

Last Modified

November 4, 2025

References (17)

cve@mitrehttp://www.openwall.com/lists/oss-security/2024/03/15/1
cve@mitrehttps://github.com/libexpat/libexpat/issues/839
cve@mitrehttps://github.com/libexpat/libexpat/pull/842
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPLC6WDSRDUYS7F7JWAOVOHFNOUQ43DD/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LKJ7V5F6LJCEQJXDBWGT27J7NAP3E3N7/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VK2O34GH43NTHBZBN7G5Y6YKJKPUCTBE/
cve@mitrehttps://security.netapp.com/advisory/ntap-20240322-0001/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/03/15/1
af854a3a-2127-422b-91ae-364da2661108https://github.com/libexpat/libexpat/issues/839
af854a3a-2127-422b-91ae-364da2661108https://github.com/libexpat/libexpat/pull/842
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPLC6WDSRDUYS7F7JWAOVOHFNOUQ43DD/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LKJ7V5F6LJCEQJXDBWGT27J7NAP3E3N7/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VK2O34GH43NTHBZBN7G5Y6YKJKPUCTBE/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FPLC6WDSRDUYS7F7JWAOVOHFNOUQ43DD/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LKJ7V5F6LJCEQJXDBWGT27J7NAP3E3N7/

Vendor Advisories for CVE-2024-28757(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(12)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libexpat1-dev (2.5.0-2ubuntu0.1) @ mantic	2026-05-24	ubuntu
redhat	rhcos-413.92.202604080111-0	2026-04-16	redhat
redhat	rhcos-4.19.9.6.202604080618-0	2026-04-16	redhat
redhat	rhcos-414.92.202603110216-0	2026-03-26	redhat
redhat	rhcos-417.94.202603102246-0	2026-03-19	redhat
redhat	rhcos-415.92.202603101737-0	2026-03-19	redhat
redhat	rhcos-416.94.202603112010-0	2026-03-19	redhat
redhat	rhcos-418.94.202603021444-0	2026-03-11	redhat
redhat	expat-0:2.5.0-1.el8_10	2025-11-19	redhat
redhat	expat-0:2.5.0-1.el9_2.1	2024-06-13	redhat
redhat	expat-0:2.5.0-2.el9_4	2024-04-30	redhat
redhat	expat-0:2.5.0-1.el9_3.1	2024-03-26	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-776Improper Restriction of Recursive Entity References (XML Entity Expansion)

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 15× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 07:01 UTCEG score recompute
2026-05-24 07:01 UTCVendor advisory
2026-05-24 07:01 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2024-28757?

CVE-2024-28757 is a high vulnerability published on March 10, 2024. libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

When was CVE-2024-28757 disclosed?

CVE-2024-28757 was first published in the National Vulnerability Database on March 10, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-28757 actively exploited?

CVE-2024-28757 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-28757?

CVE-2024-28757 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2024-28757?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-28757, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-28757

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