What is CVE-2026-32778?

CVE-2026-32778 is a low-severity vulnerability in Libexpat Project, classified under NULL Pointer Dereference. CVSS score: 2.9/10. Published 2026-03-16.

How severe is CVE-2026-32778?

Low severity. CVSS v3 base score is 2.9 out of 10.

NULL pointer dereference in Libexpat Project

CVE-2026-32778

libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.

Published 2026-03-16 · last modified 2026-07-14.

CVSS v3 metric

CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.002 (4.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000

Affected products

Libexpat Project — versions 0
Libexpat Project

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/libexpat/libexpat/pull/1159 (Patch, Issue Tracking)
github.com/libexpat/libexpat/pull/1163 (Patch, Issue Tracking)
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Frequently asked questions

What is CVE-2026-32778?: CVE-2026-32778 is a low-severity vulnerability in Libexpat Project, classified under NULL Pointer Dereference. CVSS score: 2.9/10. Published 2026-03-16.
How severe is CVE-2026-32778?: Low severity. CVSS v3 base score is 2.9 out of 10.