Critical 10.0Published Jan 12, 2016

CVE-2015-8659The 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.

Updated under an hour ago (Nov 2, 2026, 12:20 AM ET)

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It affects apple mac_os_x and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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: 10.0 CRITICAL (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple mac_os_x apple:mac_os_x	through 10.11.3	NVD
nghttp2 nghttp2 nghttp2:nghttp2	through 1.5.0	NVD
apple iphone_os apple:iphone_os	through 9.2.1	NVD
apple tvos apple:tvos	through 9.1	NVD
apple watchos apple:watchos	through 2.1	NVD

References

References

http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175085.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175423.html
http://www.openwall.com/lists/oss-security/2015/12/23/10
http://www.openwall.com/lists/oss-security/2015/12/23/6
http://www.securitytracker.com/id/1035353
https://nghttp2.org/blog/2015/12/23/nghttp2-v1-6-0/	patch, vendor-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.