# CVE-2026-108577: Konstanty Bialkowski libmodplug ABC Music Format load_abc.cpp abc_add_gchord resource consumption

> Remote attackers can cause resource consumption and denial of service in libmodplug via a crafted ABC Music Format file.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** AZL-108056, DEBIAN-CVE-2026-108577, ECHO-5576-aad2-1138, GHSA-252h-2265-gp6c, UBUNTU-CVE-2026-108577

## What is CVE-2026-108577?

CVE-2026-108577 is a medium-severity denial of service vulnerability in Konstanty Bialkowski libmodplug, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability was determined in Konstanty Bialkowski libmodplug up to 0.8.9.1. This issue affects the function abc_add_gchord of the file src/load_abc.cpp of the component ABC Music Format Parser. This manipulation causes resource consumption. The attack may be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2026-108577?


## How do I fix CVE-2026-108577?

No fix published yet.

## Is CVE-2026-108577 being exploited?

There is no known exploitation of CVE-2026-108577 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108577 and fix it if it is affected.

What it is: CVE-2026-108577 is a medium-severity denial of service vulnerability in Konstanty Bialkowski libmodplug, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-108577 in the wild and no public exploit code.

Affected product: Konstanty Bialkowski libmodplug. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-108577/ (Markdown: https://insights.sbomify.com/CVE-2026-108577/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108577
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108577
- OSV: https://osv.dev/vulnerability/CVE-2026-108577

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108577/
Summaries are generated and may contain mistakes; the official description above is the record.