01 Record

CVE-2026-42795

Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root

MediumPUBLISHEDCNA: EEF

CNA base score5.1 CVSS v4.0CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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02 Description

Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.2% of scored records. A rank, not a probability.

NVD base score

5.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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

NVD analysis status

Deferred. NVD last modified this record on 2026-07-22.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-06-02 13:41Z3 MO AGO

Last updated

2026-06-02 19:14Z3 MO AGO

Reserved

2026-04-29

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

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

Weaknesses

CWE-59Improper Link Resolution Before File Access ('Link Following')Base

Data version

5.2

Document digest

33f80c46a8a33acc4b49059fd784d594f9b6c53f811cc6ffb22bca0e4a6ea49a

05 Affected products

VendorProductVersionsPlatforms

GleamGleam0.10.0-rc1 to < 1.17.0, c82a2d83bd0c06cafdc196820deb3f89a9b3ff7c to < 6435a5528b9ae0449e2f32be579641ec485f6866, v0.10.0-rc1-elixir to < v1.17.0-elixir, v0.10.0-rc1-erlang to < v1.17.0-erlang, v0.10.0-rc1-node to < v1.17.0-node, v0.10.0-rc1-node-slim to < v1.17.0-node-slim, v0.10.0-rc1-elixir-slim to < v1.17.0-elixir-slim, v0.10.0-rc1-erlang-slim to < v1.17.0-erlang-slim, v0.10.0-rc1-erlang-alpine to < v1.17.0-erlang-alpine, v0.10.0-rc1-elixir-alpine to < v1.17.0-elixir-alpine, v0.10.0-rc1-node-alpine to < v1.17.0-node-alpine, v0.10.0-rc1-scratch to < v1.17.0-scratch—

06 References

github.comhttps://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqcvendor-advisoryrelated
cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-42795.htmlrelated
osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-42795related
github.comhttps://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866patch

01 Record index

CVE-2026-42795

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-42795

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References