All vulnerabilities

Servers and applications

CVE-2017-16931

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.

Severity
Critical 9.8
Published
23 Nov 2017
Last changed
14 Oct 2026
Added to UpHeron
1 Nov 2026
Exploit chance
4.6% in the next 30 daysHigher than 91% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
libxml2Servers and applications · cpe:a:xmlsoft:libxml2
  • Every version up to 2.9.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-16931
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-16931