CVE-2026-113786
Description
A flaw was found in pypdf. A remote attacker could trigger a Denial of Service (DoS) or unexpected behavior by enticing a user or service to process a specially crafted PDF document. When an image marked with a JPEG filter is loaded, pypdf fails to restrict decoding to the JPEG format before passing the data to the Pillow image library. Consequently, an unintended image parser is invoked to process the malformed data, potentially leading to application errors or instability.
Statement
This vulnerability is rated Low impact because exploitation is limited to a localized denial of service during document parsing, requiring an attacker to supply a specially crafted file to an environment with the optional Pillow image library active. In Red Hat environments such as OpenShift AI, Lightspeed, and Quay, pypdf operates as an internal backend component, meaning an attack only disrupts the immediate processing task rather than compromising underlying host confidentiality or integrity. Furthermore, deployments that do not invoke image extraction workflows or lack the optional image processing dependency remain unaffected.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.3 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Required | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | Low | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
When untrusted input is not properly validated for the expected syntax, attackers could cause parsing failures, trigger unexpected errors, or expose latent vulnerabilities that might not be directly exploitable if the input had conformed to the syntax.
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