Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.
Priority LOW 36CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.
Why it matters now
EPSS 0.0089 59th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tesseract-ocr:tesseract_ocr:5.0.0:alpha-20201231:*:*:*:*:*:* | 5.0.0 alpha-20201231 | Vulnerable | tesseract-ocr |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Linux |
- cpe:2.3:a:tesseract-ocr:tesseract_ocr:5.0.0:alpha-20201231:*:*:*:*:*:* Versions 5.0.0 alpha-20201231 Vulnerable ·tesseract-ocr
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36081
- 2026-10-03 Alias added: GHSA-5x29-fwcc-jm29
References
More tesseract-ocr Tesseract Ocr vulnerabilities
- TI-2026-60073 Tesseract: Heap out-of-bounds write in Classify::ReadIntTemplates via unvalidated counts in crafted .traineddata CVSS 4.0HIGH 8.6
- TI-2026-60071 Tesseract: Heap out-of-bounds write in GenericVector<T>::read due to independent reserved/size_used_ fields CVSS 4.0HIGH 8.6
- TI-2026-60069 Tesseract: Heap out-of-bounds write in LSTM::Forward via na_/gate-matrix dimension mismatch CVSS 4.0HIGH 8.6
- TI-2026-60068 Tesseract: Heap out-of-bounds write/read in FullyConnected::Forward via layer/weight-matrix dimension mismatch CVSS 4.0HIGH 8.6
- TI-2026-60074 Tesseract: Denial of service via empty-stack dereference in Plumbing/Series at model load CVSS 4.0MEDIUM 6.9
- TI-2026-60070 Tesseract: Out-of-bounds write in UnicharCompress via unvalidated recoder code values CVSS 4.0MEDIUM 6.9
Sources
- CVE-2021-36081 · CVE Program
- CVE-2021-36081 · NVD
- FIRST EPSS
- GHSA-5x29-fwcc-jm29 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences