No exploitation reportedFix available

CVE-2026-109596

Hugo from v0.162.0 before v0.167.0 Symlink File Disclosure via Nested Mount Ancestor

No exploitation reported by the sources we read.

Published2026-10-12
WeaknessCWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Hugo from v0.162.0 before v0.167.0 contains an improper link resolution vulnerability that lets malicious themes or modules expose files outside their root via nested-mount ancestor directories. Attackers controlling a theme can place a symlink or NTFS junction at a virtual ancestor directory, causing resources.Match to list and publish local files during builds.

Timeline

dates in UTC

2026-10-1223:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-109596?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-109596?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-109596 Red Hat Product Security4 products fixed · 5 known affected
hugo: Hugo: Information disclosure via improper link resolution in nested mounts
grafana as a component of Red Hat Enterprise Linux 10 · grafana-selinux as a component of Red Hat Enterprise Linux 10 · grafana.src as a component of Red Hat Enterprise Linux 10 · +2 more
RHSA-2026:80677 Red Hat Product Security4 products fixed
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Fix

Vendor fix Red Hat Product Security CVE-2026-109596 · 4 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Workaround from the vendor Red Hat Product Security CVE-2026-109596 · 9 productsAvoid compiling Hugo sites with untrusted themes or modules. When processing unverified third-party themes, execute Hugo builds within an isolated, unprivileged container environment with minimal directory mounts.
No fix available, says the vendor Red Hat Product Security CVE-2026-109596 · 5 productsFix deferred

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-10-14
OpenCVESSVC decisionnone—
CNACVSS 4.06.7read 2026-10-23
CNACVSS 3.15.5read 2026-10-23
CNAweakness (CWE)CWE-59read 2026-10-23
FIRST EPSSEPSS score0.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 4.0 vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: 2026-10-12
Last Modified: 2026-10-16
NVD status: Awaiting Analysis

Frequently asked questions

What is CVE-2026-109596?

Is CVE-2026-109596 actively exploited?

Active exploitation of CVE-2026-109596 has not been confirmed. Its EPSS score was 0.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-109596?

CVE-2026-109596 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Running hugo? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database