CVE-2026-40930
Description
A flaw was found in libpng, a library used for processing PNG (Portable Network Graphics) image files. In version 1.8.0, a remote attacker could provide a specially crafted APNG (Animated Portable Network Graphics) file. This flaw allows attacker-controlled data within an ignored chunk to be reinterpreted as a new chunk header, leading to a low impact on data integrity and availability. This could result in unexpected application behavior or a denial of service.
Statement
This Moderate flaw in libpng allows a remote attacker to cause a denial of service or unexpected application behavior. By processing a specially crafted Animated Portable Network Graphics (APNG) file, vulnerable applications may misinterpret attacker-controlled data as a new chunk header, leading to resource exhaustion or crashes.
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 | 5.4 | N/A | 5.4 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
Frequently Asked Questions
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