CVE-2024-45490
No exploitation reported by the sources we read.
- Published2024-08-30
- Fixed in2.6.3
- WeaknessCWE-190 · CWE-611
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.
Timeline
dates in UTC- 2024-08-3003:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-45490?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-45490?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.6 | < 2.6.3 | 2.6.3 | NVD · CISA-ADP |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- expatAlmaLinux:9all versions · fixed in 2.5.0-2.el9_4.1and 1 other package
- expatAlmaLinux:8all versions · fixed in 2.2.5-15.el8_10and 1 other package
Vendor advisories
Subnet Solutions PowerSYSTEM Center
Subnet Solutions PowerSYSTEM Center PSC 2020: <=v5.22.x
Fix
- Update Libexpat project libexpat to 2.6.3
- Mitigation from the vendor CISA ICSA-24-317-01 · 1 productSubnet Solutions inc. reports that dependencies have been updated and vulnerabilities are to be addressed in PowerSYSTEM Center 2020 Update 23 release.
- Mitigation from the vendor CISA ICSA-24-317-01 · 1 productSubnet Solutions inc. strongly recommends users update to the latest version. If this is not possible, the following mitigations have been identified:
- Mitigation from the vendor CISA ICSA-24-317-01 · 1 productApply application allow-listing to prevent unauthorized executables from running.
- Mitigation from the vendor CISA ICSA-24-317-01 · 1 productEnsure Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) are enabled within the operating system. Memory protection controls can be enabled via Windows Security. Please refer to this article for reference.
Advisories and patches
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2024-08-30
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2024-45490?
Is CVE-2024-45490 actively exploited?
What is the CVSS score for CVE-2024-45490?
Running expat? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.