CVE-2026-93990 - Expat through 2.8.4 Malformed UTF-16 Acceptance via Unchecked Surrogate

CVE-2026-93990 - Expat through 2.8.4 Malformed UTF-16 Acceptance via Unchecked Surrogate

https://cvefeed.io/rssfeed/latest.atom / Sun, 09/20/2026 - 01:33
CVE ID :CVE-2026-93990
Published : Sept. 19, 2026, 10:58 p.m. | 11 minutes ago
Description :Expat through 2.8.4 fails to validate low surrogates following high surrogates in UTF-16 input, allowing malformed UTF-16 sequences to be accepted. Attackers can craft UTF-16 encoded XML with lone high surrogates that consume following code units, hiding markup characters from the parser and enabling XML injection attacks.
Severity: 8.7 | HIGH
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Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.