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VulnerabilityPublished

CVE-2026-70437: Jenkins Webhook Secret Credentials Provider Plugin · Timing Side Channel

Affects Jenkins Webhook Secret Credentials Provider PluginSource CVE Database V5

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Not known to be exploited · CVSS 3.7 Low.

Data as of 3 Nov 2026, 22:58 UTC

CVSS 3.1 base score
3.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Jenkins ProjectJenkins Webhook Secret Credentials Provider PluginAffected
  • <=16.v0cfa_f0215cf5
Fixed in–

AI-suggested

Until a fix is available, consider restricting access to webhook endpoints and monitoring for unusual webhook activity. Avoid relying solely on this plugin for critical authentication without additional safeguards.

Description

A timing attack vulnerability exists in Jenkins Webhook Secret Credentials Provider Plugin versions 16.v0cfa_f0215cf5 and earlier. The plugin does not use a constant-time comparison function when verifying webhook bearer tokens, which could allow attackers to infer valid tokens through statistical analysis. The vulnerability has a low CVSS score of 3.7 and does not impact integrity or availability.

References

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