CVE-2023-26364

Denial of Service of regular expression in package @adobe/css-tools

5.3 MediumFix available

@adobe/css-tools version 4.3.0 and earlier are affected by an Improper Input Validation vulnerability that could result in a minor denial of service while attempting to parse CSS. Exploitation of this issue does not require user interaction or privileges.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

1.15%Up 1.1 points since Nov 18, 2023

What each source reports

CVE List Score used 5.3

Denial of Service of regular expression in package @adobe/css-tools

Record: CVE-2023-26364
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-20
Updated: 2026-11-02

EUVDEUVD-2023-2304 5.3

Record: EUVD-2023-2304
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hpx4-r86g-5jrg 5.0

@adobe/css-tools Regular Expression Denial of Service (ReDOS) while Parsing CSS

Impact

@adobe/css-tools version 4.3.0 and earlier are affected by an Improper Input Validation vulnerability that could result in a denial of service while attempting to parse CSS.

Patches

The issue has been resolved in 4.3.1.

Workarounds

None

References

N/A

Record: GHSA-hpx4-r86g-5jrg
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Weakness: CWE-20, CWE-1333
Updated: 2026-11-02

NVD 5.3

Record: CVE-2023-26364
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-20
Updated: 2026-11-02

OSVGHSA-hpx4-r86g-5jrg 5.0

@adobe/css-tools Regular Expression Denial of Service (ReDOS) while Parsing CSS

Impact

@adobe/css-tools version 4.3.0 and earlier are affected by an Improper Input Validation vulnerability that could result in a denial of service while attempting to parse CSS.

Patches

The issue has been resolved in 4.3.1.

Workarounds

None

References

N/A

Record: GHSA-hpx4-r86g-5jrg
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Weakness: CWE-1333, CWE-20
Updated: 2026-11-02

OSVSUSE-SU-2024:1415-1 No score

Security update for cockpit-wicked

This update for cockpit-wicked fixes the following issues:

CVE-2023-26364: Fixed denial of service due to improper input validation during CSS parsing (bsc#1217325)

Other fixes:

Update to version 5~git8.c06c55b.

Record: SUSE-SU-2024:1415-1
Updated: 2026-11-02

OSVSUSE-SU-2024:1415-2 No score

Security update for cockpit-wicked

This update for cockpit-wicked fixes the following issues:

CVE-2023-26364: Fixed denial of service due to improper input validation during CSS parsing (bsc#1217325)

Other fixes:

Update to version 5~git8.c06c55b.

Record: SUSE-SU-2024:1415-2
Updated: 2026-11-02

OSVSUSE-SU-2024:1416-1 No score

Security update for cockpit-wicked

This update for cockpit-wicked fixes the following issues:

CVE-2023-26364: Fixed denial of service due to improper input validation during CSS parsing (bsc#1217325)

Other fixes:

Upgrade to version 4.5

Record: SUSE-SU-2024:1416-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`@adobe/css-tools` npm	before 4.3.1	4.3.1
`cockpit-wicked` SUSE:Linux Enterprise Micro 5.5	before 5~git8.c06c55b-150500.3.3.1	5~git8.c06c55b-150500.3.3.1
`cockpit-wicked` SUSE:Linux Enterprise Micro 5.4	before 4.5-150400.3.3.1	4.5-150400.3.3.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-26364 is a medium vulnerability (CVSS 5.3) in Adobe Css-tools, published August 29, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 67th percentile. Fixed in @adobe/css-tools 4.3.1.

References

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