CVE-2026-86515

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-09-08. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A security vulnerability has been detected in vgmstream up to r2117. Impacted is the function add_entry of the file src/meta/txtp_parser.c of the component txtp. Such manipulation of the argument range_start/range_end leads to resource consumption. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The name of the patch is 4b6a02dd1aff6428255db912563d77d4cb0a143e. It is advisable to implement a patch to correct this issue.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 8, 2026

Advisory Details (4)

Auto-updated Sep 8, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

GitHub - vgmstream/vgmstream: vgmstream - A library for playback of various streamed audio formats used in video games. · GitHub

https://github.com/vgmstream/vgmstream/
github_commit

commit 4b6a02dd1aff (vgmstream/vgmstream)

Fix landed in vgmstream/vgmstream commit 4b6a02dd1aff — awaiting tagged release

https://github.com/vgmstream/vgmstream/commit/4b6a02dd1aff6428255db912563d77d4cb0a143e
github_pr

misc2

Fix merged in vgmstream/vgmstream PR #1965 on 2026-07-22 — awaiting tagged release

https://github.com/vgmstream/vgmstream/pull/1965
generic

Unbounded TXTP subsong range expansion causes memory and CPU exhaustion · Issue #1973 · vgmstream/vgmstream · GitHub

https://github.com/vgmstream/vgmstream/issues/1973

Vendor Advisories for CVE-2026-86515(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 02:37 UTCEG score recompute
  2. 2026-09-19 02:37 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 03:54 UTCEG score recompute
  5. 2026-09-18 03:54 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 05:12 UTCEG score recompute
  8. 2026-09-17 05:12 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 06:29 UTCEG score recompute
  11. 2026-09-16 06:29 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 07:47 UTCEG score recompute
  14. 2026-09-15 07:47 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 09:04 UTCEG score recompute
  18. 2026-09-14 09:04 UTCGHSA enrichment
  19. 2026-09-13 10:22 UTCEG score recompute
  20. 2026-09-13 10:22 UTCGHSA enrichment
  21. 2026-09-12 11:40 UTCEG score recompute
  22. 2026-09-12 11:40 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 12:57 UTCEG score recompute
Show 18 more
  1. 2026-09-11 12:57 UTCGHSA enrichment
  2. 2026-09-10 14:15 UTCEG score recompute
  3. 2026-09-10 14:15 UTCGHSA enrichment
  4. 2026-09-09 15:32 UTCEG score recompute
  5. 2026-09-09 15:32 UTCGHSA enrichment
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-08 16:46 UTCEG score recompute
  8. 2026-09-08 16:45 UTCGHSA enrichment
  9. 2026-09-08 16:28 UTCNVD updateCVSS v4 → 2.1
  10. 2026-09-08 15:36 UTCEG score recompute
  11. 2026-09-08 15:36 UTCGHSA enrichment
  12. 2026-09-08 15:24 UTCMITRE cvelistV5CVSS v4 → 5.3
  13. 2026-09-08 13:42 UTCGHSA enrichment
  14. 2026-09-08 03:34 UTCEG score recompute
  15. 2026-09-08 03:34 UTCGHSA enrichment
  16. 2026-09-08 03:33 UTCNVD updateCVSS v4 → 2.1
  17. 2026-09-08 03:05 UTCEG score recompute
  18. 2026-09-08 03:04 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86515?
CVE-2026-86515 is a medium vulnerability published on September 8, 2026. A security vulnerability has been detected in vgmstream up to r2117. Impacted is the function addentry of the file src/meta/txtpparser.c of the component txtp. Such manipulation of the argument rangestart/rangeend leads to resource consumption. The attack may be performed from remote. The exploit…
When was CVE-2026-86515 disclosed?
CVE-2026-86515 was first published in the National Vulnerability Database on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86515 actively exploited?
CVE-2026-86515 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.7% of all scored CVEs.
What is the CVSS score of CVE-2026-86515?
CVE-2026-86515 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-86515?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86515, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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