CVE-2026-88050: Tesseract is an open source OCR engine

Q: How do I fix CVE-2026-88050?

tesseract ocr: upgrade to newer than 5.5.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-88050 being exploited?

CVE-2026-88050 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-88050 affect?

CVE-2026-88050 affects tesseract ocr. Severity is medium (CVSS 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. UnicharCompr

Q: How urgent is CVE-2026-88050?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-88050 is a medium-severity flaw (CVSS 5.5) affecting tesseract ocr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 res

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-09-10
Last modified	2026-09-14

Publisher (CNA): GitHub, Inc. · Vendor: tesseract-ocr

Last updated 2026-09-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-10 17:17 UTCPublished CVE record published
2026-09-14 20:02 UTCUpdated Record last modified

tesseract-ocr tesseract ocr UPGRADE

Affected: <= 5.5.3

Fixed in: newer than 5.5.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tesseract-ocr || rpm -q tesseract-ocr || tesseract-ocr --version

2. UPGRADE to newer than 5.5.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tesseract-ocr

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tesseract-ocr

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-88050?

tesseract ocr: upgrade to newer than 5.5.3. Exact commands for each OS are on this page.

Is CVE-2026-88050 being exploited?

CVE-2026-88050 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-88050 affect?

CVE-2026-88050 affects tesseract ocr. Severity is medium (CVSS 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. UnicharCompr

How urgent is CVE-2026-88050?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2026-88051 HIGH 7.8 UPGRADE Tesseract is an open source OCR engine
CVE-2026-88052 HIGH 7.8 UPGRADE Tesseract is an open source OCR engine
CVE-2026-88053 HIGH 7.8 UPGRADE Tesseract is an open source OCR engine
CVE-2026-88054 MEDIUM 5.5 UPGRADE Tesseract is an open source OCR engine
CVE-2026-88049 MEDIUM 5.5 UPGRADE Tesseract is an open source OCR engine

References

← Back to latest CVEs