CKEditor up to 47.7.3/48.5.0 Style Attribute Processing null termination

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k2.97

Summaryinfo

A vulnerability labeled as critical has been found in CKEditor up to 47.7.3/48.5.0. This affects an unknown function of the component Style Attribute Processing. Such manipulation leads to null termination. This vulnerability is documented as CVE-2026-116688. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in CKEditor up to 47.7.3/48.5.0. Affected by this issue is an unknown part of the component Style Attribute Processing. The manipulation with an unknown input leads to a null termination vulnerability. Using CWE to declare the problem leads to CWE-132. This entry has been deprecated because it was a duplicate of CWE-170. All content has been transferred to CWE-170. Impacted is confidentiality, integrity, and availability. CVE summarizes:

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 45.0.0 until 47.7.4 and 48.5.1, the engine uses a vulnerable es-toolkit version whose prototype-pollution behavior can be reached while CKEditor processes incoming style attribute values. Crafted editor content can thereby cause unauthorized JavaScript execution in the browser. This issue is fixed in versions 47.7.4 and 48.5.1.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-116688 since 10/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 47.7.4 or 48.5.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null termination
CWE: CWE-132 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CKEditor 47.7.4/48.5.1

Timelineinfo

10/26/2026 CVE reserved
10/27/2026 +1 days Advisory disclosed
10/27/2026 +0 days VulDB entry created
10/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-116688 (🔒)
GCVE (CVE): GCVE-0-2026-116688
GCVE (VulDB): GCVE-100-427556

Entryinfo

Created: 10/27/2026 20:57
Changes: 10/27/2026 20:57 (63)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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