{"id":"CVE-2026-73066","title":"Tesseract is an open source OCR engine","summary":"Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolv…","severity":"high","cwe":["CWE-787"],"published":"2026-08-11","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:46:02.457","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73066","references":[{"url":"https://github.com/tesseract-ocr/tesseract/commit/2f4d2f4bf45c363785d7bf1da29b6628f8939a72","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/pull/4588","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/releases/tag/5.5.3","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7j76-5rq5-5jg8","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73066.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73066"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2514011"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73066"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73066"},{"url":"https://access.redhat.com/errata/RHSA-2026:67830"},{"url":"https://access.redhat.com/errata/RHSA-2026:67832"},{"url":"https://access.redhat.com/errata/RHSA-2026:67831"},{"url":"https://access.redhat.com/errata/RHSA-2026:69111"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00126,"epssPercentile":0.0267,"ingestedAt":"2026-09-09T21:22:45.527Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 9)","affected":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","enterprise_linux_codeready_linux_builder_v_9"],"patched":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","enterprise_linux_codeready_linux_builder_v_9"],"cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","cvssSource":"vendor","slug":"CVE-2026-73066","body":"## Overview\n\nTesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 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- **RHSA-2026:67830** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67830)\n- **RHSA-2026:67832** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67832)\n- **RHSA-2026:67831** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67831)\n- **RHSA-2026:69111** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69111)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205466,"id":"CVE-2026-73066","ts":1789576721259,"field":"cvss","old":null,"new":"7.1"},{"seq":205465,"id":"CVE-2026-73066","ts":1789576721259,"field":"severity","old":"none","new":"high"}]}