CVE-2026-86142 (GCVE-0-2026-86142)
Vulnerability from cvelistv5 – Published: 2026-09-05 04:29 – Updated: 2026-09-05 04:29
VLAI
EPSS
VEX
Summary
In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.
Severity
6.9 (Medium)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
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"attackVector": "LOCAL",
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"references": [
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"url": "https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"
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"url": "https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58"
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"datePublished": "2026-09-05T04:29:33.323Z",
"dateReserved": "2026-09-05T04:29:32.967Z",
"dateUpdated": "2026-09-05T04:29:33.323Z",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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