CVE-2023-39615: Xmlsoft Libxml2 v2.11.0 was discovered to contain an out-of-bounds read via the xmlSAX2StartElement() function at /libxml2/SAX2.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted XML file. NOTE: the vendor's position is that the product does not support the legacy SAX1 interface with custom callbacks; there is a crash even without crafted input.

CSIRTS triage

What: Out-of-bounds read vulnerability in xmlSAX2StartElement() function when parsing crafted XML.
Who is affected: Applications using Libxml2 v2.11.0 that process untrusted XML files.
Urgency: Medium severity (CVSS 6.5) denial of service; vendor disputed but impact confirmed.
Action: Upgrade Libxml2 beyond v2.11.0 or apply vendor-supplied patch.

AI-assisted analysis generated from the source advisory — verify against the original.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2023-396150.67% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 49% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2023-39615	coverage & exploitation status	NVD · CVE.org