CVE-2026-89246Network attack vectorHinoki check available

Spreadsheet formula execution via unsanitized comment export

Published Sep 11, 2026 · Updated Sep 11, 2026

CSV formula injection in WWBN AVideo through commit c3edcc2 allows remote authenticated users to execute formulas via comment exports. The myComments.download.php endpoint writes comment text beginning with =, +, -, or @ to CSV cells without neutralizing spreadsheet formula prefixes. Execution requires an administrator or video owner to open the downloaded CSV in a spreadsheet, where the formula runs with that viewer's spreadsheet privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

CSV formula injection in WWBN AVideo through commit c3edcc2 allows remote authenticated users to execute formulas via comment exports. The myComments.download.php endpoint writes comment text beginning with =, +, -, or @ to CSV cells without neutralizing spreadsheet formula prefixes. Execution requires an administrator or video owner to open the downloaded CSV in a spreadsheet, where the formula runs with that viewer's spreadsheet privileges.

The record

CVE
CVE-2026-89246
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
WWBN
Product
AVideo
Classifications
T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <=c3edcc274c389816d434acadac07ee78eaf330c1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WWBN · AVideoversion=0 <=c3edcc274c389816d434acadac07ee78eaf330c1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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