Detections
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Alpine: multiple libpng packages: security update to 1.6.55-r0

high Tenable Cloud Security Plugin ID 437941

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable
 Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the
 png_set_quantize() API function. When the function is called with no histogram and the number of colors in
 the palette is more than twice the maximum supported by the user's display, certain palettes will cause
 the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer.
 The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is
 fixed in 1.6.55. (CVE-2026-25646)

See Also

https://security.alpinelinux.org/vuln/CVE-2026-25646

Plugin Details

Severity: High

ID: 437941

Version: Revision 1.2

Type: Local

Published: 2/24/2026

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.92

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-25646

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-25646

IAVA: 2026-A-0135