CVE-2023-46656Network attack vector

Webhook token disclosure via non-constant-time comparison

Published Oct 25, 2023 · Updated Feb 13, 2025

Timing side channel in Jenkins Multibranch Scan Webhook Trigger Plugin 1.0.9 and earlier allows remote attackers to recover a webhook token. The webhook authentication path compares the supplied token with the configured token using a non-constant-time operation whose runtime leaks matching information. Repeated unauthenticated requests can reveal a valid token, which permits scans of matching multibranch jobs without other credentials.

CVSS severity5.3
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Timing side channel in Jenkins Multibranch Scan Webhook Trigger Plugin 1.0.9 and earlier allows remote attackers to recover a webhook token. The webhook authentication path compares the supplied token with the configured token using a non-constant-time operation whose runtime leaks matching information. Repeated unauthenticated requests can reveal a valid token, which permits scans of matching multibranch jobs without other credentials.

The record

CVE
CVE-2023-46656
Published
Oct 25, 2023
Updated
Feb 13, 2025
Vendor
Jenkins Project
Product
Jenkins Multibranch Scan Webhook Trigger Plugin
Classifications
CWE-697
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=0 <=1.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Jenkins Multibranch Scan Webhook Trigger Pluginversion=0 <=1.0.9

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-697Incorrect Comparison

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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