CVE-2026-113351
Public on 2026-10-20
Modified on 2026-10-22
Description
libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail with XML_ERROR_NO_MEMORY until it is recreated.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | expat | Not Affected | ||
| Amazon Linux 2023 | expat | Pending Fix | ||
| Amazon Linux 2027 Preview | expat | Pending Fix | ||
| Amazon Linux 2 - Firefox Extra | firefox | Not Affected | ||
| Amazon Linux 2023 | firefox | Not Affected | ||
| Amazon Linux 2027 Preview | firefox | Not Affected | ||
| Amazon Linux 2 - Firefox Extra | firefox-amzn-policies-generic | Not Affected | ||
| Amazon Linux 2 - Core | thunderbird | Not Affected | ||
| Amazon Linux 2 - Core | xmlrpc | Not Affected | ||
| Amazon Linux 2 - Core | xmlrpc-c | Not Affected | ||
| Amazon Linux 2023 | xmlrpc-c | Not Affected | ||
| Amazon Linux 2027 Preview | xmlrpc-c | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |