OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as an allowed wildcard prefix followed by ../ to read root-readable files including /etc/shadow. This vulnerability is fixed in 25.12.5.
CVE-2026-62947
MEDIUMPre-NVD 4.94.9Elevated
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 4.9 under the CNA's CVSS (NVD's own analysis pending). 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: cna:github_m
4.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 4.9Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.9
- EG Score
- 4.9(low)
- EPSS
- —
- KEV
- Not listed
Published
July 15, 2026
Last Modified
July 15, 2026
Advisory Details (4)
Auto-updated Jul 16, 2026Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available
ACL bypass and arbitrary root file read via cgi-io cgi-download · Advisory · openwrt/openwrt · GitHub
https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcqgithub_release Patch Available
v25.12.5
Patch available: openwrt/openwrt v25.12.5
https://github.com/openwrt/openwrt/releases/tag/v25.12.5github_pr
Security/canonicalize path acl bypass
Fix merged in openwrt/cgi-io PR #4 on 2026-06-27 — awaiting tagged release
https://github.com/openwrt/cgi-io/pull/4github_commit
commit 72990b748987 (openwrt/cgi-io)
Fix landed in openwrt/cgi-io commit 72990b748987 — awaiting tagged release
https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× 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.
- 2026-07-15 18:25 UTCEG score recompute
- 2026-07-15 18:23 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-62947?
CVE-2026-62947 is a medium vulnerability published on July 15, 2026. OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as…
When was CVE-2026-62947 disclosed?
CVE-2026-62947 was first published in the National Vulnerability Database on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-62947?
CVE-2026-62947 has a CVSS v3 base score of 4.9 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-62947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62947, 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
Explore the affected products and dependency analysis for CVE-2026-62947
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