tesseract: A commercial quality OCR engine originally developed at HP between 1985 and 1995
CVE-2026-73066 is fixed in 6 products on 1 platform, first by RHSA-2026:71566, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.
A commercial quality OCR engine originally developed at HP between 1985 and 1995. In 1995, this engine was among the top 3 evaluated by UNLV. It was open-sourced by HP and UNLV in 2005. Security Fix(es): * tesseract: Tesseract: Heap out-of-bounds write via crafted .traineddata (CVE-2026-73066) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtesseract4 · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | libtesseract4 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract4 · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | libtesseract4 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract4 · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | libtesseract4 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract5 · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | libtesseract5 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract5 · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | libtesseract5 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
| tesseract · RHEL 10 | 5.3.4-6.el10_0.1 | RHSA-2026:71566 | Aug 11, 2026 |
| tesseract · RHEL 8 | 0:4.1.1-3.el8_10 | RHSA-2026:67832 | Sep 19, 2026 |
| tesseract · RHEL 9 | 0:4.1.1-8.el9_8 | RHSA-2026:67831 | Sep 19, 2026 |
| tesseract · almalinux 8 | 4.1.1-3.el8_10 | ALSA-2026:67832 | Sep 16, 2026 |
| tesseract · almalinux 9 | 4.1.1-8.el9_8 | ALSA-2026:67831 | Sep 16, 2026 |
| tesseract · ol 10 | 0:5.3.4-7.el10_2 | ELSA-2026-67830 | Sep 16, 2026 |
| tesseract · ol 8 | 0:4.1.1-3.el8_10 | ELSA-2026-67832 | Sep 16, 2026 |
| tesseract · ol 9 | 0:4.1.1-8.el9_8 | ELSA-2026-67831 | Sep 16, 2026 |
| tesseract · rocky 10 | 0:5.3.4-7.el10_2 | RLSA-2026:67830 | Sep 17, 2026 |
| tesseract · rocky 8 | 0:4.1.1-3.el8_10 | RLSA-2026:67832 | Sep 17, 2026 |
| tesseract · rocky 9 | 0:4.1.1-8.el9_8 | RLSA-2026:67831 | Sep 17, 2026 |
| tesseract-devel · RHEL 8 | 0:4.1.1-3.el8_10 | RHSA-2026:67832 | Sep 19, 2026 |
| tesseract-devel · RHEL 9 | 0:4.1.1-8.el9_8 | RHSA-2026:67831 | Sep 19, 2026 |
| tesseract-devel · almalinux 8 | 4.1.1-3.el8_10 | ALSA-2026:67832 | Sep 16, 2026 |
| tesseract-devel · almalinux 9 | 4.1.1-8.el9_8 | ALSA-2026:67831 | Sep 16, 2026 |
| tesseract-devel · ol 10 | 0:5.3.4-7.el10_2 | ELSA-2026-67830 | Sep 16, 2026 |
| tesseract-devel · ol 8 | 0:4.1.1-3.el8_10 | ELSA-2026-67832 | Sep 16, 2026 |
| tesseract-devel · ol 9 | 0:4.1.1-8.el9_8 | ELSA-2026-67831 | Sep 16, 2026 |
| tesseract-ocr · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | tesseract-ocr 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | tesseract-ocr 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | tesseract-ocr 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | tesseract-ocr 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | tesseract-ocr 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
| tesseract-ocr-all · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | tesseract-ocr-all 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | tesseract-ocr-all 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | tesseract-ocr-all 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | tesseract-ocr-all 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | tesseract-ocr-all 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
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