CVE-2026-42543Public exploitNetwork attack vector

Session and token disruption via state-changing GET requests

Published Jun 4, 2026 · Updated Jun 4, 2026

Cross-site request forgery in DFIR-IRIS iris-web before 2.4.28 allows remote attackers to rotate API tokens or end user sessions. The /user/token/renew and /logout handlers accept state-changing GET requests, so GET requests bypass the application's CSRF-token protection. A victim must have an active session and load attacker-controlled content; token rotation invalidates integrations using the prior token, while logout ends only the victim's session.

CVSS severity4.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in DFIR-IRIS iris-web before 2.4.28 allows remote attackers to rotate API tokens or end user sessions. The /user/token/renew and /logout handlers accept state-changing GET requests, so GET requests bypass the application's CSRF-token protection. A victim must have an active session and load attacker-controlled content; token rotation invalidates integrations using the prior token, while logout ends only the victim's session.

The record

CVE
CVE-2026-42543
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
DFIR-IRIS
Product
iris-web
Classifications
CWE-650, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 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=< 2.4.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DFIR-IRIS · iris-webversion=< 2.4.28

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-650Trusting HTTP Permission Methods on the Server Side
T1204.001Malicious Link

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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