# CVE-2026-95116: libming denial of service in readtag_file

Source: https://junglewise.ai/threats/cve-2026-95116-an-issue-in-libming-through-0-4-8-allows-a-remote-attacker-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-08. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-95116 · Severity: high · CVSS 7.5 · Published 2026-10-08

libming is a library for generating and processing SWF (Flash) files. A remote attacker can crash an application using libming by sending a malformed SWF file with an improperly sized tag, causing unbounded memory allocation and denial of service.

Technologies: [Libming](https://junglewise.ai/threats/technologies/libming). Vendors: [Libming](https://junglewise.ai/threats/vendors/libming).

## Quick answers

**Is CVE-2026-95116 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-95116 being exploited in the wild.

**How severe is CVE-2026-95116?** High severity, with a CVSS score of 7.5, published 8 October 2026.

**Which products and versions are affected?** Libming through 0.4.8.

**Is there a fix for CVE-2026-95116?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-95116 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-95116?** Check whether you run Libming at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The readtag_file() function in src/blocks/fromswf.c fails to validate the length field of long-format SWF tags, allowing an attacker to trigger an allocation-size-too-big condition (CWE-770) that results in malloc((size_t)-1). The vulnerability requires remote delivery of a truncated or malicious SWF file and leads to application crash or denial of service.

## Affected products

- libming libming through 0.4.8

## Timeline

- 2026-10-08: disclosed

## References

- [https://github.com/libming/libming/issues/449](https://github.com/libming/libming/issues/449)

## Related threats

- [Buffer overflow vulnerability in function dcputchar in decompile.c in libming 0.4.8.](https://junglewise.ai/threats/cve-2025-66877-buffer-overflow-vulnerability-in-function-dcputchar-in-decompile)
- [Buffer overflow vulnerability in function strcat in asan_interceptors.cpp in libming 0.4.8.](https://junglewise.ai/threats/cve-2025-66869-buffer-overflow-vulnerability-in-function-strcat-in-asan)