What’s Vulnerable › Vulnerabilities

CVE-2017-16931

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-23 · updated 2026-10-14
• Weakness: CWE-119

Description

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.

Affected products

• xmlsoft libxml2: through 2.9.4

References

• http://xmlsoft.org/news.html
• https://bugzilla.gnome.org/show_bug.cgi?id=766956
• https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3
• https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
• https://www.oracle.com//security-alerts/cpujul2021.html
• http://xmlsoft.org/news.html
• https://bugzilla.gnome.org/show_bug.cgi?id=766956
• https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3
• https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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