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SCA: security update for astro (GHSA-4g3v-8h47-v7g6)

medium Tenable Self-Hosted Container Security Plugin ID 445909

Description

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

 - Astro is a web framework for content-driven websites. From 2.9.0 until 7.1.0, Astro's server-side View
 Transition CSS generator interpolates animation properties into an inline style element without escaping
 them for CSS and HTML contexts. An attacker-controlled View Transition animation value such as duration
 can terminate the generated style element and inject arbitrary HTML or JavaScript. The affected code is
 packages/astro/src/runtime/server/transition.ts; renderTransition passes sheet.toString() into
 markHTMLString(), while addAnimationProperty serializes duration through toTimeValue() and also handles
 easing, direction, delay, fillMode, and name. Exploitation requires an on-demand or server-rendered route
 to pass attacker-controlled data into a View Transition animation definition and can execute arbitrary
 JavaScript in the affected application's origin, allowing access to sensitive page data and authenticated
 actions available to the victim. This issue is fixed in version 7.1.0. (CVE-2026-73422)

Solution

Update the astro library and its related packages to version 7.1.0 or later.

See Also

https://github.com/advisories/GHSA-4g3v-8h47-v7g6

Plugin Details

Severity: Medium

ID: 445909

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 8/13/2026

Updated: 8/13/2026

Risk Information

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2026-73422

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/20/2026

Vulnerability Publication Date: 7/20/2026

Reference Information

CVE: CVE-2026-73422

cwe: CWE-79