tinytag: Denial of Service via non-terminating SYLT frame parsing loop

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Summary

CVECVE-2026-32889
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-20 03:15:59 UTC
Updated2026-03-30 14:52:35 UTC
Descriptiontinytag is a Python library for reading audio file metadata. Version 2.2.0 allows an attacker who can supply MP3 files for parsing to trigger a non-terminating loop while the library parses an ID3v2 SYLT (synchronized lyrics) frame. In server-side deployments that automatically parse attacker-supplied files, a single 498-byte MP3 can cause the parsing operation to stop making progress and remain busy until the worker or process is terminated. The root cause is that _parse_synced_lyrics assumes _find_string_end_pos always returns a position greater than the current offset. That assumption is false when no string terminator is present in the remaining frame content. This issue has been fixed in version 2.2.1.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.000130000 probability, percentile 0.022210000 (date 2026-04-01)

Problem Types: CWE-835 | CWE-835 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Tinytag Project Tinytag 2.2.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tinytag Tinytag affected >= 2.2.0, < 2.2.1 Not specified

References

ReferenceSourceLinkTags
github.com/tinytag/tinytag/commit/4d649b9c314ada8ff8a74e0469e9aadb3acb252a [email protected] github.com Patch
github.com/tinytag/tinytag/commit/5cd321521ff097e41724b601d7e3d7adc7e53402 [email protected] github.com Patch
github.com/tinytag/tinytag/security/advisories/GHSA-f4rq-2259-hv29 [email protected] github.com Exploit, Patch, Vendor Advisory
github.com/tinytag/tinytag/commit/44e496310f7ced8077e9087e3774acbaa324b18a [email protected] github.com Patch
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