[UPDATE] [medium] libxml2: Vulnerability allows information disclosure

mediumCVE-2024-34459

A remote, anonymous attacker can exploit a vulnerability in libxml2 to disclose information.

CSIRTS triage

vendor: libxml2 product: libxml2 Information disclosure

What: A vulnerability in libxml2 allows a remote attacker to disclose information.
Who is affected: Remote, anonymous attackers targeting libxml2 installations.
Urgency: Remediation is important due to the potential for information disclosure, though exploitation is not currently observed.
Action: Update to the latest version of libxml2 to mitigate the vulnerability.

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

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-1159

Exploitation outlook

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

Moderate exploitation riskCVE-2024-344592.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 82% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2024-34459	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for libxml2

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[UPDATE] [hoch] libxml2: Mehrere Schwachstellen ermöglichen Denial of Servicecert-bund · 2026-09-10
high[NEU] [hoch] libxml2: Schwachstelle ermöglicht Denial of Servicecert-bund · 2026-09-09
highCVE-2026-74860: A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this…nvd · 2026-09-08
lowCVE-2026-86141: xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after…msrc · 2026-09-08
mediumCVE-2026-86143: In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse ca…msrc · 2026-09-08
mediumCVE-2026-86139: In libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer overflow.msrc · 2026-09-08