Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (../) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. Versions 2.80.0, 3.30.0, and 4.59.0 contain a patch for the issue.
CVE-2026-27606
CRITICALNVD 9.89.8
EchelonGraph scoreLOW confidence
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8(low)
- EPSS
- 69.3%
- KEV
- Not listed
Published
February 25, 2026
Last Modified
July 1, 2026
Advisory Details (9)
Auto-updated Jul 3, 2026🔬 Proof of concept available. Patch available. Sources: github_release, github, redhat, github_commit.
redhat Patch Available
redhat Patch Available
redhat Patch Available
github Patch Available🟡 PoC Available
Arbitrary File Write via Path Traversal in Rollup 4 · Advisory · rollup/rollup · GitHub
https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgcgithub_release Patch Available
v4.59.0
Patch available: rollup/rollup v4.59.0
https://github.com/rollup/rollup/releases/tag/v4.59.0github_release Patch Available
v3.30.0
Patch available: rollup/rollup v3.30.0
https://github.com/rollup/rollup/releases/tag/v3.30.0github_commit
commit d6dee5e99bb8 (rollup/rollup)
Fix landed in rollup/rollup commit d6dee5e99bb8 — awaiting tagged release
https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3github_commit Patch Available
commit c8cf1f9c48c5 (rollup/rollup)
Patch available: rollup/rollup v3.30.0 (contains commit c8cf1f9c48c5)
https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44egithub_commit Patch Available
commit c60770d7aaf7 (rollup/rollup)
Patch available: rollup/rollup v4.59.0 (contains commit c60770d7aaf7)
https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2Vendor Advisories for CVE-2026-27606(10)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:13545Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
- RHSA-2026:13512Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
- RHSA-2026:13508Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
- RHSA-2026:10175Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.27.1 Release.
- RHSA-2026:8483Red Hat Product SecurityCritical
Red Hat Security Advisory: Kiali 1.73.29 for Red Hat OpenShift Service Mesh 2.6
- RHSA-2026:6802Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Developer Hub 1.9.3 release.
- RHSA-2026:6174Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Developer Hub 1.8.5 release.
- RHSA-2026:5665Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Quay 3.10.19
- +2 more
Patch Availability(10)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | automation-gateway-0:2.5.20260422-2.el9ap | 2026-05-04 | redhat |
| redhat | automation-platform-ui-0:2.6.8-1.el9ap | 2026-05-04 | redhat |
| redhat | ansible-automation-platform-26/gateway-rhel9:1777311120 | 2026-05-04 | redhat |
| redhat | devspaces/traefik-rhel9:1776718585 | 2026-04-23 | redhat |
| redhat | openshift-service-mesh/kiali-rhel8:1776191302 | 2026-04-16 | redhat |
| redhat | rhdh/rhdh-hub-rhel9:1775140647 | 2026-04-07 | redhat |
| redhat | rhdh/rhdh-hub-rhel9:1774545605 | 2026-03-30 | redhat |
| redhat | quay/quay-rhel8:1773971077 | 2026-03-24 | redhat |
| redhat | rhtas/rhtas-console-ui-rhel9:1773934794 | 2026-03-24 | redhat |
| redhat | openshift-service-mesh/kiali-rhel8:1773059917 | 2026-03-19 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| rollup | — | 2.80.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 14× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 04:36 UTCEG score recompute
- 2026-06-30 04:36 UTCVendor advisory
- 2026-06-30 04:31 UTCNVD updatefirst tracked
Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat
Frequently asked(5)
What is CVE-2026-27606?
CVE-2026-27606 is a critical vulnerability published on February 25, 2026. Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker…
When was CVE-2026-27606 disclosed?
CVE-2026-27606 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27606 actively exploited?
CVE-2026-27606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 69.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27606?
CVE-2026-27606 has a CVSS v3 base score of 9.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-27606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27606, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-27606
Is Your Infrastructure Affected by CVE-2026-27606?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.