Security Vulnerabilities
concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The lock stores a thread's local read and write hold counts in one integer. The low 15 bits are used for the read hold count, and bit 15 is used as WRITE_LOCK_HELD. After 32,768 reentrant read acquisitions, the local read count crosses into the write-lock bit. try_write_lock then treats the thread as already holding a write lock and returns true without setting the global RUNNING_WRITER bit. This breaks the core mutual-exclusion guarantee: the caller is told it has a write lock, but other threads can still hold or acquire read locks at the same time. This vulnerability is fixed in 1.3.7.
CVSS Score
2.0
EPSS Score
0.001
Published
2026-06-24
concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReadWriteLock#release_write_lock does not verify that the calling thread acquired the write lock. Any thread with access to the lock object can release an active write lock held by another thread. A second writer can then enter its critical section while the first writer is still running. Concurrent::ReadWriteLock#release_read_lock also decrements the shared counter even when no read lock is held. Calling it on a fresh lock changes the counter from 0 to -1, after which normal read acquisition raises Concurrent::ResourceLimitError. This is a synchronization correctness issue in the public Concurrent::ReadWriteLock API. This vulnerability is fixed in 1.3.7.
CVSS Score
2.1
EPSS Score
0.002
Published
2026-06-24
Missing permission checks in Jenkins Contrast Continuous Application Security Plugin 3.11 and earlier allow attackers with Overall/Read permission to enumerate the names of configured Contrast metadata.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-24
A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-24
Jenkins OWASP ZAP Plugin 1.0.7 and earlier performs build operations on the Jenkins controller rather than the assigned agent, allowing attackers with Item/Configure permission to execute arbitrary code on the Jenkins controller.
CVSS Score
8.8
EPSS Score
0.004
Published
2026-06-24
Jenkins FitNesse Plugin 1.36 and earlier stores passwords unencrypted in job config.xml files on the Jenkins controller, where they can be viewed by users with Extended Read permission or access to the Jenkins controller file system.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-24
Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.
CVSS Score
7.1
EPSS Score
0.002
Published
2026-06-24
A missing permission check in Jenkins Assembla Plugin 1.4 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL using an attacker-specified username and password.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-06-24
A cross-site request forgery (CSRF) vulnerability in Jenkins Assembla Plugin 1.4 and earlier allows attackers to connect to an attacker-specified URL using an attacker-specified username and password.
CVSS Score
5.4
EPSS Score
0.001
Published
2026-06-24
A cross-site request forgery (CSRF) vulnerability in Jenkins Zowe zDevOps Plugin 1.1.3.50.ve350c9b_450b_1 and earlier allows attackers to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
CVSS Score
4.2
EPSS Score
0.001
Published
2026-06-24