{"id":"CVE-2026-88048","title":"Tesseract is an open source OCR engine","summary":"Tesseract is an open source OCR engine. In version 5.5.3 and earlier, FullyConnected::DeSerialize in src/lstm/fullyconnected.cpp does not validate the deserialized layer scalars ni_ and no_ against the weight-matrix dimensions. During Fu…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-125","CWE-787"],"vendor":"tesseract-ocr","product":"tesseract_ocr","affected":["tesseract_ocr <= 5.5.3"],"published":"2026-09-10","updated":"2026-09-14","sourceUpdated":"2026-09-14T20:01:33.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88048","references":[{"url":"https://github.com/tesseract-ocr/tesseract/commit/103dc134eb36411ddc6833ec20aa2c76795bd0ff","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-q44c-23p6-5mw6","label":"security-advisories@github.com"},{"url":"https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-q44c-23p6-5mw6","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88048.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-88048"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531546"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88048"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88048"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00114,"epssPercentile":0.01713,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-11T15:59:27.422376Z"},"scores":{"nvd":7.1,"cna":8.6,"vendor":7.8},"ingestedAt":"2026-09-12T17:24:59.000Z","slug":"CVE-2026-88048","body":"## Overview\n\nTesseract is an open source OCR engine. In version 5.5.3 and earlier, FullyConnected::DeSerialize in src/lstm/fullyconnected.cpp does not validate the deserialized layer scalars ni_ and no_ against the weight-matrix dimensions. During FullyConnected::Forward, MatrixDotVector in src/lstm/weightmatrix.cpp writes w.dim1() results into temp_line, which is sized from no_, and reads w.dim2() minus one inputs from curr_input, which is sized from ni_. A crafted .traineddata NT_SOFTMAX layer can therefore use inconsistent dimensions to cause a heap out-of-bounds write and read on the default LSTM engine, resulting in heap corruption, a crash, information disclosure, 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 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88048.json)","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":203229,"id":"CVE-2026-88048","ts":1789416896184,"field":"cvss","old":"8.6","new":"7.1"}]}