CVE-2026-78638

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

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.4% of scored records. A rank, not a probability.

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Not recorded

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.

Published

2026-08-25 05:30Z10 DAYS AGO

Last updated

2026-08-27 14:36Z8 DAYS AGO

Reserved

2026-08-24

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

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

Weaknesses

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

Data version

5.2

Document digest

36457dc8ba820d08dd6207ab9206b121e2542520d4c577cd67df8265a0928193

• vuldb.comVDB-394865 | peerigon unzip-crx/unzip-crx-3 Archive Extraction index.js unzip path traversalhttps://vuldb.com/vuln/394865vdb-entrytechnical-description
• vuldb.comVDB-394865 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/394865/ctisignaturepermissions-required
• vuldb.comCVE-2026-78638 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-78638third-party-advisory
• vuldb.comSubmit #886400 | peerigon / unzip-crx-3 (open source, unmaintained) unzip-crx-3 (npm) CRX/ZIP extraction library <=0.2.0 Path Traversalhttps://vuldb.com/submit/886400third-party-advisory
• github.comhttps://github.com/peerigon/unzip-crx/issues/19exploitissue-tracking
• github.comhttps://github.com/peerigon/unzip-crx/product