CVE-2026-12600 Uncontrolled memory usage in Innodata Labs’ Poppler JPX decoder
Remote attackers can cause denial of service via memory exhaustion in Poppler's JPX decoder when processing crafted PDFs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12600?
CVE-2026-12600 is a high-severity denial of service vulnerability in Poppler Innodata Labs, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-12600?
How do I fix CVE-2026-12600?
No fix has been published for CVE-2026-12600 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-12600 being exploited?
There is no known exploitation of CVE-2026-12600 in the wild and no public exploit code.
Sources
Also known as GHSA-c3v7-qg69-38rx.