CVE-2026-28355Network attack vector

JavaScript execution via unneutralized PWA token title

Published Feb 27, 2026 · Updated Feb 27, 2026

Stored cross-site scripting in Canarytokens before sha-7ff0e12 allows remote attackers to execute JavaScript through a PWA install link. The PWA token workflow stores the creator-controlled title and renders it without neutralizing JavaScript on the token installation page. Execution requires a victim to open the attacker-created link, and the vendor reports that no sensitive information, including session data, is disclosed.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Canarytokens before sha-7ff0e12 allows remote attackers to execute JavaScript through a PWA install link. The PWA token workflow stores the creator-controlled title and renders it without neutralizing JavaScript on the token installation page. Execution requires a victim to open the attacker-created link, and the vendor reports that no sensitive information, including session data, is disclosed.

The record

CVE
CVE-2026-28355
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
Thinkst Applied Research
Product
Canarytokens
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< sha-7ff0e12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Thinkst Applied Research · Canarytokensversion=< sha-7ff0e12

Published CVSS scores

1.3INCIBE-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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