CVE-2026-70437 Information disclosure in Jenkins Webhook Secret Credentials Provider Plugin
Attackers can statistically recover webhook bearer tokens due to non-constant-time comparison, potentially bypassing authentication in Jenkins.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70437?
CVE-2026-70437 is a low-severity vulnerability in Jenkins Webhook Secret Credentials Provider Plugin, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Jenkins Webhook Secret Credentials Provider Plugin 16.v0cfa_f0215cf5 and earlier does not use a constant-time comparison function when checking whether the provided and expected webhook bearer token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook bearer token.
Weakness: CWE-208
Which versions are affected by CVE-2026-70437?
How do I fix CVE-2026-70437?
No fix has been published for CVE-2026-70437 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-70437 being exploited?
There is no known exploitation of CVE-2026-70437 in the wild and no public exploit code.
Sources
Also known as GHSA-298v-p382-mwvw.