NVD / CVE Program· CNA EEF

CVE-2026-32685: Path Traversal in gleam docs build via documentation.pages Allows Arbitrary File Read and Write

Noroxi assessment

Priority: Monitor (action score 18/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
Someone with local access to the system can trigger it. No account or password is required. No special conditions are required; it is repeatable.
Fixed version: Gleam Gleam 1.17.0, 81570611906b6b0039c948037094d09a68700f3a, v1.17.0-elixir.

Low priority for now. Upgrade to Gleam Gleam 1.17.0, 81570611906b6b0039c948037094d09a68700f3a, v1.17.0-elixir or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Path traversal vulnerability in Gleam's handling of custom documentation pages allows arbitrary file read and file write outside the intended documentation output directory. The documentation.pages entries from gleam.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended project and documentation output directories. The documentation.pages[].path field can be used to write generated documentation files outside the intended build/dev/docs/<package>/ output directory. The documentation.pages[].source field can be used to read files outside the project directory and embed their contents into generated documentation output. An attacker who can convince a victim to run gleam docs build on an untrusted project, or with untrusted gleam.toml content, can cause local files readable by the victim to be included in generated documentation artifacts, and can cause generated documentation files to be written outside the intended docs output directory. This issue affects Gleam from 1.16.0 until 1.17.0.

MediumCVSS 4.6 · v4.0—No exploit Fix available

Path traversal

Published: Jun 2, 2026
Updated: Oct 6, 2026
EPSS: 0.2% · 13th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 18 / 40 · 4.6 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · EEF: 4.6; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (EEF). Independent of NVD's CPE analysis and usually ahead of it.

Gleam Gleam
- 1.16.0 and later · before 1.17.0affected · semver
- 1.16.0 and later · before 1.17.0affected · semver
- 61ed8deb6572b5591ad17d6302c1a38607522f16 and later · before 81570611906b6b0039c948037094d09a68700f3aaffected · git
- v1.16.0-elixir and later · before v1.17.0-elixiraffected · other
- v1.16.0-erlang and later · before v1.17.0-erlangaffected · other
- v1.16.0-node and later · before v1.17.0-nodeaffected · other
- v1.16.0-node-slim and later · before v1.17.0-node-slimaffected · other
- v1.16.0-elixir-slim and later · before v1.17.0-elixir-slimaffected · other
- v1.16.0-erlang-slim and later · before v1.17.0-erlang-slimaffected · other
- v1.16.0-erlang-alpine and later · before v1.17.0-erlang-alpineaffected · other

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
openSUSE:Leap 16.0	gleam	before 1.17.0-bp160.1.1	1.17.0-bp160.1.1
openSUSE:Tumbleweed	gleam	before 1.17.0-1.1	1.17.0-1.1

Same product

gleam: all records

Other highest-scoring records for the same primary product.

CVE-2026-103061Path traversal in Gleam via unvalidated package application names
23Monitor
CVE-2026-43965Path Traversal in build/packages/packages.toml Allows Arbitrary Directory Deletion
22Monitor
CVE-2026-42795Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root
20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Gleam Gleam	1.17.0	Vendor (CNA)
Gleam Gleam	81570611906b6b0039c948037094d09a68700f3a	Vendor (CNA)
Gleam Gleam	v1.17.0-elixir	Vendor (CNA)
Gleam Gleam	v1.17.0-elixir-alpine	Vendor (CNA)
Gleam Gleam	v1.17.0-elixir-slim	Vendor (CNA)
Gleam Gleam	v1.17.0-erlang	Vendor (CNA)
Gleam Gleam	v1.17.0-erlang-alpine	Vendor (CNA)
Gleam Gleam	v1.17.0-erlang-slim	Vendor (CNA)
Gleam Gleam	v1.17.0-node	Vendor (CNA)
Gleam Gleam	v1.17.0-node-alpine	Vendor (CNA)
Gleam Gleam	v1.17.0-node-slim	Vendor (CNA)
Gleam Gleam	v1.17.0-scratch	Vendor (CNA)
opensuse:gleam	1.17.0-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

evipepotafinder
Louis Pilfoldremediation reviewer
Jonatan Männchen / EEFanalyst

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-103061132 days apartPath traversal in Gleam via unvalidated package application names
23Monitor
CVE-2026-439650 days apartPath Traversal in build/packages/packages.toml Allows Arbitrary Directory Deletion
22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: A
Scope: X

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/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

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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References

cna.erlef.org/cves/CVE-2026-32685.html

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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