CVE-2016-8623

22

FAUCET Score

CVE-2016-8623 describes a use-after-free vulnerability in curl versions prior to 7.51.0, specifically impacting how it handles cookies, which can lead to information disclosure. This flaw carries a CVSS v3 score of 7.5 (High), indicating a network-exploitable vulnerability with low attack complexity and high confidentiality impact. While the vulnerability has a relatively low EPSS score and is not listed in CISA's KEV catalog, it has garnered some community discussion and media coverage. There is currently no public exploit code available, nor is it known to be actively exploited in the wild.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 7.51.0CPE matchmatch criteria	cpe:2.3:a:haxx:curl::::::::

CVSS Data

CVSS version used by this source: 3.0

3.3LOW

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.8

Impact Score

1.4

CvssVersion

3.0

Exploit Intelligence

EPSS Score

2.60%

Probability of exploitation in next 30 days

EPSS Percentile

83.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0260 is in the 71st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

jitsipatch availablevia llm_extracted

Fixed in: 7.50.3

oraclepatch availablevia nvd_reference

redhatpatch availablevia nvd_reference

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-httpd-0:2.4.34-7.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-nghttp2-0:1.7.1-7.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Text-Only JBCSFixed in: jbcs-httpd24-curl

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-curl-0:7.61.1-1.el6

sierra_wirelesspatch availablevia llm_extracted

Fixed in: 7.50.3

redhatvendor investigatingvia redhat_api

Product: Red Hat JBoss Enterprise Web Server 3Fixed in: curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: curl

redhatend of lifevia redhat_api

Product: .NET Core 2.1 on Red Hat Enterprise LinuxFixed in: rh-dotnet21-curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: curl

Vendor Advisories (3)

redhatCVE-2016-8623Low

curl: Use-after-free via shared cookies

sierra_wirelessllm-sierra_wireless-60883827f93903c8HIGH

Use after free via shared cookies

jitsillm-jitsi-0321ac241c9e3547HIGH

Use after free via shared cookies

References

access.redhat.com / errata/RHSA-2018:2486

Third Party Advisory

access.redhat.com / errata/RHSA-2018:3558

Third Party Advisory

bugzilla.redhat.com / show_bug.cgi

Issue TrackingPatchThird Party Advisory

curl.haxx.se / CVE-2016-8623.patch

PatchVendor Advisory

curl.haxx.se / docs/adv_20161102I.html

PatchVendor Advisory

lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

security.gentoo.org / glsa/201701-47

Third Party Advisory

tenable.com / security/tns-2016-21

Third Party Advisory

oracle.com / technetwork/security-advisory/cpuoct2018-4428296.html

Patch

securityfocus.com / bid/94106

Third Party AdvisoryVDB Entry

securitytracker.com / id/1037192

Third Party AdvisoryVDB Entry