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Response snapshot Oct 27, 2026, 18:26 UTC

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VulnerabilityCVE-2026-77167

Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table.

Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism.

At a glance

Exploited
Not known
Severity
7.5 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-2026-77167 (opens a new tab)

What happened

Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism. Three distinct denial-of-service conditions follow from this write primitive, all triggered from the same unauthenticated source and all self-renewing on a 24-hour cycle for as long as the injected rows remain in the database.

Scores and how they were measured

CVSS base severity

7.5

Version 3.0As of

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

Sources

  1. Primary source

    NVD CVE-2026-77167 (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

Cite this record

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

APA

KEVWire. (2026, October 27). Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. (CVE-2026-77167). https://kevwire.com/record/CVE-2026-77167

MLA

"Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. (CVE-2026-77167)." KEVWire, 27 Oct. 2026, kevwire.com/record/CVE-2026-77167.

Chicago

KEVWire. "Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. (CVE-2026-77167)." Last modified October 27, 2026. https://kevwire.com/record/CVE-2026-77167.

Evidence summary (plain text)

Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. (Oct 27, 2026).
Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism. Three distinct denial-of-service conditions follow from this write primitive, all triggered from the same unauthenticated source and all self-renewing on a 24-hour cycle for as long as the injected rows remain in the database.
CVSS 7.5 (version 3.0; evidence as of Oct 27, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-77167).
Sources:
NVD CVE-2026-77167: https://nvd.nist.gov/vuln/detail/CVE-2026-77167
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-27T16:30:58.328Z&lastModEndDate=2026-10-27T18:00:56.487Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-27T16:00:57.976Z&lastModEndDate=2026-10-27T17:30:56.344Z&resultsPerPage=500&startIndex=0
Record ID: CVE-2026-77167.
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: Oct 27, 2026, 18:00 UTC. Ingestion is not an independent editorial investigation.

NVD status: Received. 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.

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Record details

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