{"id":"CVE-2026-88051","title":"Tesseract is an open source OCR engine","summary":"Tesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size_used_ from a .traineddata model without a c…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"tesseract-ocr","product":"tesseract_ocr","affected":["tesseract_ocr <= 5.5.3"],"published":"2026-09-10","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:29:47.137","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88051","references":[{"url":"https://github.com/tesseract-ocr/tesseract/commit/56e09ca12e751623fe796ce1554ce704bffd2ef0","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-88qp-4g94-3rf3","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-88qp-4g94-3rf3","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88051.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-88051"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531566"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88051"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88051"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00176,"epssPercentile":0.06237,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T14:52:38.097741Z"},"scores":{"nvd":7.8,"cna":8.6,"vendor":7.8},"ingestedAt":"2026-09-13T16:02:03.119Z","slug":"CVE-2026-88051","body":"## Overview\n\nTesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size_used_ from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the backing array, but the callback loop writes size_used_ elements. A crafted TESSDATA_INTTEMP component with version_id 4 or later can therefore set reserved to a small value and size_used_ to a large value when fontinfo_table_.read(fp, read_info) is called from src/classify/intproto.cpp, causing a heap out-of-bounds write of FontInfo structures, heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.\n\n## Affected\n\n- `tesseract_ocr <= 5.5.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88051.json)","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":205549,"id":"CVE-2026-88051","ts":1789578031934,"field":"cvss","old":"8.6","new":"7.8"},{"seq":203741,"id":"CVE-2026-88051","ts":1789486788190,"field":"exploit_available","old":"false","new":"true"}]}