{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-88052", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-09T21:22:45.433Z", "datePublished": "2026-09-10T17:38:04.675Z", "dateUpdated": "2026-09-11T20:33:04.012Z"}, "containers": {"cna": {"title": "Tesseract: Heap out-of-bounds write in UNICHARSET::load_via_fgets via count/insert desynchronization", "problemTypes": [{"descriptions": [{"cweId": "CWE-129", "lang": "en", "description": "CWE-129: Improper Validation of Array Index", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-2hm8-q5c7-c373", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-2hm8-q5c7-c373"}, {"name": "https://github.com/tesseract-ocr/tesseract/commit/2d04d640db2e8c7e3bab2369d599343b5a8b8443", "tags": ["x_refsource_MISC"], "url": "https://github.com/tesseract-ocr/tesseract/commit/2d04d640db2e8c7e3bab2369d599343b5a8b8443"}], "affected": [{"vendor": "tesseract-ocr", "product": "tesseract", "versions": [{"version": "<= 5.5.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T17:38:04.675Z"}, "descriptions": [{"lang": "en", "value": "Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review."}], "source": {"advisory": "GHSA-2hm8-q5c7-c373", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-11T16:48:33.418715Z", "id": "CVE-2026-88052", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-11T20:33:04.012Z"}}]}}

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{"affected": [{"affectedData": [{"product": "tesseract", "vendor": "tesseract-ocr", "versions": [{"status": "affected", "version": "<= 5.5.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:tesseract-ocr:tesseract_ocr:*:*:*:*:*:*:*:*", "matchCriteriaId": "EF20D761-42A3-47CC-A85C-4A7C2EECE5F5", "versionEndIncluding": "5.5.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review."}], "id": "CVE-2026-88052", "lastModified": "2026-09-16T16:21:10.677", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-88052", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-11T16:48:33.418715Z", "version": "2.0.3"}}]}, "published": "2026-09-10T18:18:14.317", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/tesseract-ocr/tesseract/commit/2d04d640db2e8c7e3bab2369d599343b5a8b8443"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-2hm8-q5c7-c373"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "tesseract: Tesseract: Heap out-of-bounds write can lead to arbitrary code execution", "id": "2531579", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531579"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in Tesseract, an open-source Optical Character Recognition (OCR) engine. The UNICHARSET::load_via_fgets function incorrectly trusts a declared character count, which can lead to an out-of-bounds write in memory. A remote attacker could exploit this vulnerability by providing a specially crafted input, potentially causing heap corruption, a denial of service, or arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "To mitigate this vulnerability, avoid processing untrusted or malicious image and document files with Tesseract. If Tesseract is not essential for system operations, consider removing the `tesseract` package to eliminate the attack surface. If the `tesseract` package is removed, ensure that any dependent applications or services are not adversely affected."}, "name": "CVE-2026-88052", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "tesseract", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "tesseract", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "tesseract", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-10T17:38:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88052\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88052\nhttps://github.com/tesseract-ocr/tesseract/commit/2d04d640db2e8c7e3bab2369d599343b5a8b8443\nhttps://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-2hm8-q5c7-c373"], "threat_severity": "Important"}