What is CVE-2024-45491?

CVE-2024-45491 is a critical-severity vulnerability in Libexpat_project Libexpat, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2024-08-30.

How severe is CVE-2024-45491?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2024-45491 known to be exploited?

12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Libexpat_project Libexpat

CVE-2024-45491

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

Vulnerability class: Integer Overflow

EPSS: 0.011 (78.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Libexpat_project Libexpat
N/a — versions n/a

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-45491?: CVE-2024-45491 is a critical-severity vulnerability in Libexpat_project Libexpat, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2024-08-30.
How severe is CVE-2024-45491?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2024-45491 known to be exploited?: 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.