CVE-2026-70427: Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of `.tar` and `.tar.gz` archives, allowi

mediumCVSS 4.3CVE-2026-70427

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of .tar and .tar.gz archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary locations on the file system, restricted only by file system access permissions of the user running Jenkins.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 4.3
Published: 2026-08-05
Last updated: 2026-08-05
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-70427

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-704270.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-70427	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Jenkins Plugins: Multiple vulnerabilitiescert-bund
unknownJenkins Multiple Vulnerabilitieshkcert
unknownJenkins Security Advisory 2026-08-05jenkins

Recent advisories for Jenkins

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownJenkins security advisory (AV26-782)cccs · 2026-08-06
high[NEW] [high] Jenkins Plugins: Multiple vulnerabilitiescert-bund · 2026-08-06
unknownJenkins Multiple Vulnerabilitieshkcert · 2026-08-06
highCVE-2026-70448: Jenkins Ivy Report Plugin 1.2 and earlier does not configure its XML parser to prevent XML ext…nvd · 2026-08-05
mediumCVE-2026-70447: Missing permission checks in Jenkins AWS CodeBuild Plugin 0.59 and earlier allow attackers wit…nvd · 2026-08-05
mediumCVE-2026-70446: Missing permission checks in Jenkins CodeSonar Plugin 3.6.0 and earlier allow attackers with O…nvd · 2026-08-05