CVE-2017-16931
criticalparser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a…
Vendor / product: Xmlsoft — libxml2
parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.
CVSS
9.8
9.8 (CVSS v3.0)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.0 (nvd@nist.gov)
Timeline (UTC)
Published: 2017-11-23 21:29
Modified: 2026-10-14 07:16
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
xmlsoft / libxml2 ≤2.9.4
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: http://xmlsoft.org/news.html
Vendor advisory: http://xmlsoft.org/news.html
Patch / mitigation: https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3
Patch / mitigation: https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3
References
- http://xmlsoft.org/news.html cve@mitre.org
- https://bugzilla.gnome.org/show_bug.cgi?id=766956 cve@mitre.org
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 cve@mitre.org
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html cve@mitre.org
- https://www.oracle.com//security-alerts/cpujul2021.html cve@mitre.org
- http://xmlsoft.org/news.html af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.gnome.org/show_bug.cgi?id=766956 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 af854a3a-2127-422b-91ae-364da2661108
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html af854a3a-2127-422b-91ae-364da2661108
- https://www.oracle.com//security-alerts/cpujul2021.html af854a3a-2127-422b-91ae-364da2661108
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗