CVE-2026-46599
Description
A flaw was found in the golang.org/x/image/tiff package's TIFF decoder. This vulnerability occurs because the decoder does not properly limit the size of PackBits-compressed data. A remote attacker could exploit this by providing a maliciously-crafted image, leading to the decoder processing excessive amounts of data. This can result in a Denial of Service (DoS) due to resource exhaustion, even with a small input image.
Statement
Red Hat rates this issue as Moderate with RH CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). A flaw was found in golang.org/x/image/tiff where the TIFF decoder does not limit the size of PackBits-compressed data. A maliciously crafted TIFF image with small declared dimensions can cause the decoder to process disproportionately large amounts of compressed data, leading to resource exhaustion. Exploitation requires user interaction (opening a crafted TIFF file). Most Red Hat products that bundle golang.org/x/image do not process untrusted TIFF input in their supported execution paths.
Mitigation
Update affected Go applications to use golang.org/x/image version 0.41.0 or later, which limits the amount of compressed data the decoder will process. As a workaround, restrict accepted image formats at the application edge and reject TIFF input where it is not a required format. Applications that do not decode untrusted TIFF images are not affected.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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