{"id":"CVE-2026-88050","title":"Tesseract is an open source OCR engine","summary":"Tesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts negative code_ values from a crafted .traineddata recoder component. UnicharCo…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-787"],"vendor":"tesseract-ocr","product":"tesseract_ocr","affected":["tesseract_ocr <= 5.5.3"],"published":"2026-09-10","updated":"2026-09-14","sourceUpdated":"2026-09-14T20:02:01.503","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88050","references":[{"url":"https://github.com/tesseract-ocr/tesseract/commit/c94a5532ee04db5a4919542832fd94caee5ea58f","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88050.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-88050"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531551"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88050"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88050"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00144,"epssPercentile":0.03057,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T17:28:04.777181Z"},"scores":{"nvd":5.5,"cna":6.9,"vendor":5.5},"ingestedAt":"2026-09-12T05:48:06.702Z","slug":"CVE-2026-88050","body":"## Overview\n\nTesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts negative code_ values from a crafted .traineddata recoder component. UnicharCompress::ComputeCodeRange in src/ccutil/unicharcompress.cpp can consequently produce code_range_ equal to zero, after which SetupDecoder indexes is_valid_start_ with the negative code on a size-zero vector. The resulting out-of-bounds bit write uses a large wrapped index and reliably causes a wild-address crash or allocation failure on the default LSTM engine. 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** · Moderate · 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 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88050.json)","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":203232,"id":"CVE-2026-88050","ts":1789416896200,"field":"cvss","old":"6.9","new":"5.5"},{"seq":52144,"id":"CVE-2026-88050","ts":1789063373344,"field":"exploit_available","old":"false","new":"true"}]}