libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Libexpat Project |
|
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References
| Link | Providers |
|---|---|
| https://github.com/libexpat/libexpat/pull/1278 |
|
History
Sun, 21 Jun 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Use-After-Free Vulnerability in libexpat Due to Missing Depth Tracking |
Sun, 21 Jun 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219. | |
| First Time appeared |
Libexpat Project
Libexpat Project libexpat |
|
| Weaknesses | CWE-416 | |
| CPEs | cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Libexpat Project
Libexpat Project libexpat |
|
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2026-06-21T15:58:59.347Z
Updated: 2026-06-21T15:58:59.347Z
Reserved: 2026-06-21T15:58:58.955Z
Link: CVE-2026-56412
Vulnrichment
No data.
NVD
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Redhat
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