CVE-2026-86145 (GCVE-0-2026-86145)
Vulnerability from cvelistv5 – Published: 2026-09-05 05:09 – Updated: 2026-09-05 05:09
VLAI
EPSS
VEX
Summary
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
Severity
8.2 (High)
CWE
- CWE-424 - Improper Protection of Alternate Path
Assigner
References
Impacted products
{
"containers": {
"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "PCRE2",
"vendor": "PCRE",
"versions": [
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"lessThan": "10.48",
"status": "affected",
"version": "10.32",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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"descriptions": [
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}
],
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 8.2,
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"integrityImpact": "HIGH",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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"problemTypes": [
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"descriptions": [
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"description": "CWE-424 Improper Protection of Alternate Path",
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"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-05T05:09:25.571Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf"
},
{
"url": "https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48"
}
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"cveMetadata": {
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"cveId": "CVE-2026-86145",
"datePublished": "2026-09-05T05:09:25.571Z",
"dateReserved": "2026-09-05T05:09:25.213Z",
"dateUpdated": "2026-09-05T05:09:25.571Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-86145\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2026-09-05T06:17:10.370\",\"lastModified\":\"2026-09-05T06:17:10.370\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"PCRE\",\"product\":\"PCRE2\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"10.32\",\"lessThan\":\"10.48\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-424\"}]}],\"references\":[{\"url\":\"https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf\",\"source\":\"cve@mitre.org\"}]}}"
}
}
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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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