CVE-2015-8659

CRITICALNVD 10.010.0—

10.0

The idle stream handling in nghttp2 before 1.6.0 allows attackers to have unspecified impact via unknown vectors, aka a heap-use-after-free bug.

CVSS v3: 10.0
EG Score: 10.0(medium)
EPSS: 84.7%
KEV: Not listed

Published

January 12, 2016

Last Modified

May 6, 2026

Advisory Details (4)

Auto-updated May 31, 2026

No patch confirmed yet.

generic

Nghttp2 v1.6.0 - nghttp2.org

https://nghttp2.org/blog/2015/12/23/nghttp2-v1-6-0/

generic

http://www.securitytracker.com/id/1035353

generic

oss-security - Use after free in nghttp2

http://www.openwall.com/lists/oss-security/2015/12/23/6

generic

oss-security - Re: Use after free in nghttp2

http://www.openwall.com/lists/oss-security/2015/12/23/10

Data Freshness Timeline

(refreshed 8× in last 7d / 20× 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.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 03:55 UTCOSV refresh
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore

Frequently asked(5)

What is CVE-2015-8659?

CVE-2015-8659 is a critical vulnerability published on January 12, 2016. The idle stream handling in nghttp2 before 1.6.0 allows attackers to have unspecified impact via unknown vectors, aka a heap-use-after-free bug.

When was CVE-2015-8659 disclosed?

CVE-2015-8659 was first published in the National Vulnerability Database on January 12, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-8659 actively exploited?

CVE-2015-8659 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2015-8659?

CVE-2015-8659 has a CVSS v3 base score of 10.0 (NVD).

How do I remediate CVE-2015-8659?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8659, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2015-8659

Explore →

Is Your Infrastructure Affected by CVE-2015-8659?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2015-8659

📅 Published

🔄 Last Modified

📋 Advisory Details (4)

Nghttp2 v1.6.0 - nghttp2.org

oss-security - Use after free in nghttp2

oss-security - Re: Use after free in nghttp2

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2015-8659?

Published

Last Modified

Advisory Details (4)

Frequently asked(5)