CVE-2026-89146

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-11. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

libp2p-rendezvous through 0.17.1 fails to validate registration TTL values in discovery responses, allowing attackers to trigger timer arithmetic overflow. A malicious rendezvous server can send a discovery response with an unbounded TTL value that causes the client node process to panic when computing the expiry timer.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 11, 2026

Advisory Details (4)

Auto-updated Sep 11, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses | Advisories | VulnCheck

https://www.vulncheck.com/advisories/libp2p-rendezvous-through-0.17.1-denial-of-service-via-unbounded-registration-ttl-in-discovery-responses
generic

GitHub - libp2p/rust-libp2p: The Rust Implementation of the libp2p networking stack. · GitHub

https://github.com/libp2p/rust-libp2p
generic

libp2p-rendezvous 0.17.1 - Docs.rs

https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs
generic🟡 PoC Available

libp2p-rendezvous: Remote Denial of Service Through Registration Lifetime Handling · GitHub

https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989

Vendor Advisories for CVE-2026-89146(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 25× in last 7d / 36× 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. 2026-09-20 00:24 UTCEG score recompute
  2. 2026-09-20 00:24 UTCGHSA enrichment
  3. 2026-09-19 11:21 UTCGHSA enrichment
  4. 2026-09-18 22:18 UTCEG score recompute
  5. 2026-09-18 22:18 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 09:16 UTCGHSA enrichment
  8. 2026-09-17 20:13 UTCEG score recompute
  9. 2026-09-17 20:13 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 07:10 UTCGHSA enrichment
  12. 2026-09-16 18:07 UTCEG score recompute
  13. 2026-09-16 18:07 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 04:23 UTCGHSA enrichment
  17. 2026-09-15 15:04 UTCEG score recompute
  18. 2026-09-15 15:04 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 01:52 UTCGHSA enrichment
  21. 2026-09-14 12:49 UTCGHSA enrichment
  22. 2026-09-13 23:46 UTCEG score recompute
  23. 2026-09-13 23:46 UTCGHSA enrichment
  24. 2026-09-13 16:48 UTCEPSS rescore
  25. 2026-09-13 10:44 UTCGHSA enrichment
Show 11 more
  1. 2026-09-12 21:41 UTCEG score recompute
  2. 2026-09-12 21:41 UTCGHSA enrichment
  3. 2026-09-12 15:02 UTCEPSS rescore
  4. 2026-09-12 08:38 UTCGHSA enrichment
  5. 2026-09-11 19:35 UTCEG score recompute
  6. 2026-09-11 19:35 UTCGHSA enrichment
  7. 2026-09-11 19:07 UTCEG score recompute
  8. 2026-09-11 19:07 UTCGHSA enrichment
  9. 2026-09-11 11:26 UTCEG score recompute
  10. 2026-09-11 10:55 UTCEG score recompute
  11. 2026-09-11 10:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89146?
CVE-2026-89146 is a high vulnerability published on September 11, 2026. libp2p-rendezvous through 0.17.1 fails to validate registration TTL values in discovery responses, allowing attackers to trigger timer arithmetic overflow. A malicious rendezvous server can send a discovery response with an unbounded TTL value that causes the client node process to panic when…
When was CVE-2026-89146 disclosed?
CVE-2026-89146 was first published in the National Vulnerability Database on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89146 actively exploited?
CVE-2026-89146 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 63.6% of all scored CVEs.
What is the CVSS score of CVE-2026-89146?
CVE-2026-89146 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-89146?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89146, 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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