CVE-2024-45490

HIGHNVD 7.59.8▲

7.5

An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.

CVSS v3: 7.5
EG Score: 9.8(medium)
EPSS: 70.2%
KEV: Not listed

Published

August 30, 2024

Last Modified

May 12, 2026

References (11)

cve@mitrehttps://github.com/libexpat/libexpat/issues/887
cve@mitrehttps://github.com/libexpat/libexpat/pull/890
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Dec/10
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Dec/12
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Dec/6
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Dec/7
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Dec/8
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20241018-0004/
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-613116.html

Vendor Advisories for CVE-2024-45490(2)

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 (2.1.0-7ubuntu0.16.04.5+esm9) @ xenial	2026-05-21	ubuntu
ubuntu	libxmltok1-dev (1.2-3ubuntu0.16.04.1~esm4) @ xenial	2026-05-21	ubuntu
ubuntu	libexpat1-dev (2.4.7-1ubuntu0.4) @ jammy	2026-05-21	ubuntu
ubuntu	libxmltok1t64 (1.2-4.1ubuntu2.24.0.4.1+esm1) @ noble	2026-05-21	ubuntu
redhat	expat	2025-04-02	redhat
redhat	service-interconnect/skupper-site-controller-rhel9:1.5.5-4	2024-12-16	redhat
redhat	service-interconnect/skupper-site-controller-rhel9:1.4.7-3	2024-11-21	redhat
redhat	rhcos-417.94.202411070820-0	2024-11-19	redhat
redhat	rhcos-416.94.202410020522-0	2024-10-09	redhat
redhat	service-interconnect/skupper-site-controller-rhel9:1.4.7-2	2024-09-26	redhat
redhat	expat-0:2.2.5-15.el8_10	2024-09-24	redhat
redhat	expat-0:2.5.0-2.el9_4.1	2024-09-18	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(2)

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

Additional Vendor Advisories

(11)

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 11× in last 7d / 20× 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.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 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
2026-05-26 07:18 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch

Frequently asked(5)

What is CVE-2024-45490?

CVE-2024-45490 is a high vulnerability published on August 30, 2024. An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.

When was CVE-2024-45490 disclosed?

CVE-2024-45490 was first published in the National Vulnerability Database on August 30, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-45490 actively exploited?

CVE-2024-45490 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-45490?

CVE-2024-45490 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.

How do I remediate CVE-2024-45490?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-45490, 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-2024-45490

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CVE-2024-45490

Published

Last Modified

References (11)

Vendor Advisories for CVE-2024-45490(2)

Patch Availability(12)

Weakness Classification(2)

Additional Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-45490?

Same vendor

Same CWE

CVE-2024-45490

📅 Published

🔄 Last Modified

🔗 References (11)

📣 Vendor Advisories for CVE-2024-45490(2)

Patch Availability(12)

Weakness Classification(2)

Additional Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-45490?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (11)

Vendor Advisories for CVE-2024-45490(2)

Frequently asked(5)

Related CVEs(same vendor + same CWE)