CVE-2026-26027Network attack vector

Stored XSS via unauthenticated inventory submission

Published Apr 6, 2026 · Updated Apr 6, 2026

Stored XSS in the inventory endpoint in GLPI 11.0.0 through 11.0.5 allows remote attackers to persist script payloads without authentication. The upstream advisory does not identify the accepted inventory field, storage path, or missing output-encoding operation beyond stating that the endpoint stores the payload. Execution requires a user to view the stored content, after which the script runs in that user's browser and can act with that session's access.

CVSS severity7.5
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the inventory endpoint in GLPI 11.0.0 through 11.0.5 allows remote attackers to persist script payloads without authentication. The upstream advisory does not identify the accepted inventory field, storage path, or missing output-encoding operation beyond stating that the endpoint stores the payload. Execution requires a user to view the stored content, after which the script runs in that user's browser and can act with that session's access.

The record

CVE
CVE-2026-26027
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
GLPI Project
Product
GLPI
Classifications
CWE-79, CWE-306, CWE-116, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 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=>= 11.0.0, < 11.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GLPI Project · GLPIversion=>= 11.0.0, < 11.0.6

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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')
CWE-306Missing Authentication for Critical Function
CWE-116Improper Encoding or Escaping of Output
T1203Exploitation for Client Execution

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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