EUVD-2026-75636Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local attack vector requires supplying a crafted model file; no privileges needed; crash-only impact confined to availability.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
3DescriptionCVE.org
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Plumbing::DeSerialize in src/lstm/plumbing.cpp rejects excessively large network stacks but accepts a zero-length stack for NT_SERIES, NT_PARALLEL, or NT_REVERSED layers in a crafted .traineddata model. During LSTMRecognizer initialization in src/lstm/lstmrecognizer.cpp, CacheXScaleFactor(XScaleFactor()) reaches Series::CacheXScaleFactor in src/lstm/series.cpp, which dereferences stack_[0] on the empty vector and invokes a virtual method through an invalid Network pointer. This causes a deterministic crash and denial of service at model load. No fixed release is available as of this review.
AnalysisAI
Denial of service in Tesseract OCR Engine 5.5.3 and earlier allows a local attacker to crash any process that loads a crafted .traineddata model file. The deserialization path in Plumbing::DeSerialize fails to reject a zero-length network stack for NT_SERIES, NT_PARALLEL, or NT_REVERSED layer types; subsequent initialization in Series::CacheXScaleFactor unconditionally dereferences stack_[0] on the now-empty vector, producing a deterministic crash via an invalid virtual method call through a dangling Network pointer. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target application must load a .traineddata model file that is controlled or influenced by the attacker; this is the sole prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H) reflects a locally-triggered, low-complexity DoS with no confidentiality or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch with a tagged version exists at the time of this analysis; the upstream fix is available as commit 552771236b0d80cbdb0c7dd856120fa21a4672e5 on the tesseract-ocr/tesseract GitHub repository (https://github.com/tesseract-ocr/tesseract/commit/552771236b0d80cbdb0c7dd856120fa21a4672e5), which adds a bounds check in Plumbing::DeSerialize and a graceful error return in the model-load path. … Detailed patch versions, workarounds, and compensating controls in full report. |
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An issue in the Leptonica linked library (v1.79.0) allows attackers to cause an arithmetic exception leading to a Denial
Heap out-of-bounds write in Tesseract OCR 5.5.3 and earlier allows an attacker who controls a crafted `.traineddata` mod
Heap out-of-bounds write and read in Tesseract OCR Engine 5.5.3 and earlier allows an attacker who can supply a crafted
Stack-based buffer overflow in Tesseract OCR 5.5.3 and earlier corrupts the stack during legacy engine initialization, e
Heap out-of-bounds write in Tesseract OCR 5.5.3 and earlier allows an attacker who supplies a crafted .traineddata langu
Heap out-of-bounds write in Tesseract OCR 5.5.3 and earlier allows an attacker who controls the loaded .traineddata mode
Heap corruption in Tesseract OCR 5.5.3 and earlier allows an attacker who can supply a malicious unicharset file to corr
Out-of-bounds write in Tesseract OCR engine version 5.5.3 and earlier allows an attacker who can supply a crafted `.trai
Heap out-of-bounds write in Tesseract OCR engine prior to 5.5.3 is triggered by a crafted LSTM .traineddata model file t
Heap out-of-bounds read in Tesseract OCR prior to version 5.5.3 allows an attacker who can supply a crafted .traineddata
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today