CVE-2026-88050Medium· 5.5▾ TwilightPoC availableTesseract 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 30.3 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 11.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
0.2%
Last analysed / modified upstream
6.9 → 5.5
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. 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.
tesseract_ocr <= 5.5.3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-88053High· 7.8Tesseract is an open source OCR engine
CVE-2026-88051High· 7.8Tesseract is an open source OCR engine
CVE-2026-88049Medium· 5.5Tesseract is an open source OCR engine
CVE-2026-88048High· 7.1Tesseract is an open source OCR engine
CVE-2026-88054Medium· 5.5Tesseract is an open source OCR engine
CVE-2026-88047High· 7.8Tesseract is an open source OCR engine