CVE-2026-104266: tinytag · Infinite Loop
Affects tinytagSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 2.3.0 when convenient.
Data as of 26 Oct 2026, 14:18 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-10-21.
- Patch
- Available – fixed in 2.3.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade tinytag to 2.3.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| tinytagtinytag | Affected
| Fixed in
|
Description
tinytag is a Python library for reading audio file metadata. From 2.0.0 until 2.3.0, an M4A file containing a sub-atom with a size of zero inside a ---- atom can cause the metadata parser to stop advancing through the input. The custom-field atom traversal repeatedly processes the malformed location, causing an infinite loop and denying service to a program that reads the crafted file. This issue is fixed in version 2.3.0.
References
- github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg (opens in a new tab)
- github.com/tinytag/tinytag/pull/326 (opens in a new tab)
- github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e (opens in a new tab)
- github.com/tinytag/tinytag/releases/tag/2.3.0 (opens in a new tab)