CVE-2026-27612Public exploitNetwork attack vector

Reflected XSS via unsanitized RepoCard repo prop

Published Feb 25, 2026 · Updated Feb 25, 2026

Reflected XSS in DenPiligrim repostat before 1.0.1 allows remote attackers to execute JavaScript in a user's browser via the repo prop. During RepoCard's loading state, dangerouslySetInnerHTML interpolates the unsanitized repo value into an HTML string instead of using JSX escaping. Exploitation requires a consuming application to pass attacker-controlled input to repo and a user to load the affected view, enabling script execution within that application's origin.

CVSS severity6.1
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in DenPiligrim repostat before 1.0.1 allows remote attackers to execute JavaScript in a user's browser via the repo prop. During RepoCard's loading state, dangerouslySetInnerHTML interpolates the unsanitized repo value into an HTML string instead of using JSX escaping. Exploitation requires a consuming application to pass attacker-controlled input to repo and a user to load the affected view, enabling script execution within that application's origin.

The record

CVE
CVE-2026-27612
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
DenPiligrim
Product
repostat
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=< 1.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DenPiligrim · repostatversion=< 1.0.1

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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