CVE-2023-41936Network attack vector

Authentication token recovery via timing comparison

Published Sep 6, 2023 · Updated Sep 26, 2024

Timing side channel in Jenkins Google Login Plugin 1.7 and earlier allows remote attackers to obtain a valid authentication token. The token-validation path compares provided and expected values with a non-constant-time equality operation, exposing comparison progress through response timing. Repeated unauthenticated network measurements against a reachable, configured Google login flow are required; a recovered value is accepted by the token check.

CVSS severity7.5
High
EPSS probability0.81%
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 Google Login Plugin 1.7 and earlier allows remote attackers to obtain a valid authentication token. The token-validation path compares provided and expected values with a non-constant-time equality operation, exposing comparison progress through response timing. Repeated unauthenticated network measurements against a reachable, configured Google login flow are required; a recovered value is accepted by the token check.

The record

CVE
CVE-2023-41936
Published
Sep 6, 2023
Updated
Sep 26, 2024
Vendor
Jenkins Project
Product
Google Login Plugin
Classifications
CWE-697, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record 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 <=1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Google Login Pluginversion=0 <=1.7

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-697Incorrect Comparison
T1190Exploit Public-Facing Application

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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