How severe is CVE-2024-55549?

CVE-2024-55549 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2024-55549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-55549?

CVE-2024-55549 affects Xmlsoft Libxslt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-55549?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-55549 have an EU (EUVD) identifier?

Yes. CVE-2024-55549 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-54264.

When was CVE-2024-55549 published?

CVE-2024-55549 was published on 2025-03-14 and last updated on 2026-06-17.

CVE-2024-55549

CVE-2024-55549 is a high-severity vulnerability in Xmlsoft Libxslt with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-54264
Weakness: CWE-416
Affected product: Xmlsoft Libxslt
Published: 2025-03-14
Last modified: 2026-06-17

Description

xsltGetInheritedNsList in libxslt before 1.1.43 has a use-after-free issue related to exclusion of result prefixes.

Frequently asked questions

What is CVE-2024-55549?: xsltGetInheritedNsList in libxslt before 1.1.43 has a use-after-free issue related to exclusion of result prefixes.
How severe is CVE-2024-55549?: CVE-2024-55549 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2024-55549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-55549?: CVE-2024-55549 affects Xmlsoft Libxslt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-55549?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-55549 have an EU (EUVD) identifier?: Yes. CVE-2024-55549 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-54264.
When was CVE-2024-55549 published?: CVE-2024-55549 was published on 2025-03-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xmlsoft:libxslt:*:*:*:*:*:*:*:*

More vulnerabilities in Xmlsoft Libxslt

CVE-2019-11068 — Critical (CVSS 9.8): libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite…
CVE-2016-4610 — Critical (CVSS 9.8): libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on…
CVE-2016-4609 — Critical (CVSS 9.8): libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on…
CVE-2016-4608 — Critical (CVSS 9.8): libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on…
CVE-2016-4607 — Critical (CVSS 9.8): libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before 12.4.2 on Windows, iCloud before 5.2.1 on…
CVE-2021-30560 — High (CVSS 8.8): Use after free in Blink XSLT in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit…

All CVEs affecting Xmlsoft Libxslt →

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CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

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