CVE-2026-19988

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 18.5% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-08-20.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-17 05:30Z18 DAYS AGO

Last updated

2026-08-18 14:25Z17 DAYS AGO

Reserved

2026-08-16

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
• CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)Variant

Data version

5.2

Document digest

77e424292045b07003ef9cdaa0751ce687f28dcb3fd1d402660d7f248ea8356b

• vuldb.comVDB-391192 | Alaev SEO Tools Extension Popup UI popup.html addDiv cross site scriptinghttps://vuldb.com/vuln/391192vdb-entrytechnical-description
• vuldb.comVDB-391192 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/391192/ctisignaturepermissions-required
• vuldb.comCVE-2026-19988 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-19988third-party-advisory
• vuldb.comSubmit #873939 | Alaev & Co Alaev SEO Tools: Free Audit & Analysis 1.0.10 Cross Site Scriptinghttps://vuldb.com/submit/873939third-party-advisory
• github.comhttps://github.com/xryj920/chrome_extensions/blob/main/Alaev%20%26%20Co%20Alaev%20SEO%20Tools%201.0.10%20allows%20extension%20popup%20UI%20injection%20through%20unsanitized%20page%20SEO%20fieldsexploit