CVE-2016-9586
curl before version 7.52.0 is vulnerable to a buffer overflow when doing a large floating point output in libcurl's implementation of the printf() functions.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
curl before version 7.52.0 is vulnerable to a buffer overflow when doing a large floating point output in libcurl's implementation of the printf() functions. If there are any application that accepts a format string from the outside without necessary input filtering, it could allow remote attacks.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.75% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-119
- Affected
- haxx/curl
- Source
- secalert@redhat.com
EPSS 4.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/95019Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037515Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3558
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9586Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/adv_20161221A.htmlVendor Advisory
- https://github.com/curl/curl/commit/curl-7_51_0-162-g3ab3c16Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
- https://security.gentoo.org/glsa/201701-47Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/95019Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037515Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3558
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9586Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/adv_20161221A.htmlVendor Advisory
- https://github.com/curl/curl/commit/curl-7_51_0-162-g3ab3c16Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
- https://security.gentoo.org/glsa/201701-47Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.