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Servers and applications

CVE-2018-14404

A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.

Severity
Medium 6.5
Published
19 Jul 2018
Last changed
14 Oct 2026
Added to UpHeron
1 Nov 2026
Exploit chance
3.7% in the next 30 daysHigher than 89% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Null pointer dereference (CWE-476)
Attack
Over the network · No login needed · Needs someone to click or open something
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
libxml2Servers and applications · cpe:a:xmlsoft:libxml2
  • Every version up to 2.9.8

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-14404
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-14404