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Response snapshot Nov 2, 2026, 19:26 UTC

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VulnerabilityCVE-2019-12439

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point.

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

At a glance

Exploited
Not known
Severity
7.4 High (CVSS 3.0)
Chance of exploitation
Not estimated
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2019-12439 (opens a new tab)

Scores and how they were measured

CVSS base severity

7.4

Version 3.0As of

CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    NVD CVE-2019-12439 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  2. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  3. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, November 2). bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. (CVE-2019-12439). https://kevwire.com/record/CVE-2019-12439

MLA

"bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. (CVE-2019-12439)." KEVWire, 2 Nov. 2026, kevwire.com/record/CVE-2019-12439.

Chicago

KEVWire. "bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. (CVE-2019-12439)." Last modified November 2, 2026. https://kevwire.com/record/CVE-2019-12439.

Evidence summary (plain text)

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. (May 29, 2019).
bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.
CVSS 7.4 (version 3.0; evidence as of Nov 2, 2026; https://nvd.nist.gov/vuln/detail/CVE-2019-12439).
Sources:
NVD CVE-2019-12439: https://nvd.nist.gov/vuln/detail/CVE-2019-12439
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-02T17:56:05.581Z&lastModEndDate=2026-11-02T19:25:57.888Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-02T17:21:00.248Z&lastModEndDate=2026-11-02T18:55:57.389Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-02T16:46:03.426Z&lastModEndDate=2026-11-02T18:20:57.848Z&resultsPerPage=500&startIndex=0
Record ID: CVE-2019-12439.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Nov 2, 2026, 19:25 UTC. Ingestion is not an independent editorial investigation.

NVD status: Modified. Publication in the NVD is not evidence of exploitation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail