CVE-2026-92705

Code execution via automatically loaded subtitle-linked scripts

Published Oct 9, 2026 · Updated Oct 9, 2026

Code execution in Aegisub 3.2.0 through 3.4.2 allows attackers to run Automation scripts when victims open crafted ASS subtitle files. The Automation Scripts metadata loader executes referenced scripts without a trust check; in 3.4.0 through 3.4.2, extension validation and filesystem operations interpret embedded NUL characters differently, allowing an ASS/Lua polyglot to execute itself. Exploitation requires opening the malicious subtitle file, but requires no authentication or elevated privileges and executes code with the Aegisub process's privileges.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Aegisub 3.2.0 through 3.4.2 allows attackers to run Automation scripts when victims open crafted ASS subtitle files. The Automation Scripts metadata loader executes referenced scripts without a trust check; in 3.4.0 through 3.4.2, extension validation and filesystem operations interpret embedded NUL characters differently, allowing an ASS/Lua polyglot to execute itself. Exploitation requires opening the malicious subtitle file, but requires no authentication or elevated privileges and executes code with the Aegisub process's privileges.

The record

CVE
CVE-2026-92705
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
TypesettingTools
Product
Aegisub
Classifications
CWE-158, CWE-829, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.2.0, < 3.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

TypesettingTools · Aegisubversion=>= 3.2.0, < 3.5.0

Published CVSS scores

7.8TypesettingToolsCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-158Improper Neutralization of Null Byte or NUL Character
CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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