CVE-2026-12600

Uncontrolled memory usage in Innodata Labs’ Poppler JPX decoder

Published Aug 25, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
Denial-of-service (DoS) vulnerability in the internal JPEG2000 (JPX) decoding implementation of the Poppler fork developed by Innodata Labs. When an application processes an untrusted PDF file containing specially crafted JPXDecode images, a remote attacker can cause uncontrolled memory consumption. The flaw occurs in the JPXStream::readCodestream() function, where values controlled from the SIZ segment (such as img.nComps) are used for the memory allocation of tiles and components without adequate validation. This allows an attacker to force excessive memory allocation and cause a resource exhaustion, ultimately causing the pdftoppm process to terminate due to out-of-memory (OOM) conditions.

Remediation

Vendor Solution

No fix has been reported as yet for the fork maintained by Innodata Labs. Meanwhile, Poppler has removed the JPX decoder code.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Poppler
Poppler innodata Labs
Vendors & Products Poppler
Poppler innodata Labs
Type Values Removed Values Added
Title Uncontrolled memory usage in Innodata Labs’ Poppler JPX decoderUncontrolled memory usage in Innodata Labs’ Poppler JPX decoder Uncontrolled memory usage in Innodata Labs’ Poppler JPX decoder
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Denial-of-service (DoS) vulnerability in the internal JPEG2000 (JPX) decoding implementation of the Poppler fork developed by Innodata Labs. When an application processes an untrusted PDF file containing specially crafted JPXDecode images, a remote attacker can cause uncontrolled memory consumption. The flaw occurs in the JPXStream::readCodestream() function, where values controlled from the SIZ segment (such as img.nComps) are used for the memory allocation of tiles and components without adequate validation. This allows an attacker to force excessive memory allocation and cause a resource exhaustion, ultimately causing the pdftoppm process to terminate due to out-of-memory (OOM) conditions.
Title Uncontrolled memory usage in Innodata Labs’ Poppler JPX decoderUncontrolled memory usage in Innodata Labs’ Poppler JPX decoder
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
INCIBE
Published
Updated
Aug 26, 2026, 12:22 PM
Reserved
Jun 18, 2026, 10:33 AM
Status
Deferred
Published
Aug 25, 2026, 11:16 AM
Modified
Sep 28, 2026, 11:10 PM