CVE-2018-16839
Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.78% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-190, CWE-119
- Affected
- haxx/curl · debian/debian linux · canonical/ubuntu linux
- Source
- secalert@redhat.com
EPSS moved from 4.7% on 21 September 2026 to 5.8% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securitytracker.com/id/1042012Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2018-16839.htmlPatch, Vendor Advisory
- https://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5Patch, Third Party Advisory
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/11/msg00005.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201903-03Third Party Advisory
- https://usn.ubuntu.com/3805-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4331Third Party Advisory
- http://www.securitytracker.com/id/1042012Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839Issue Tracking, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2018-16839.htmlPatch, Vendor Advisory
- https://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5Patch, Third Party Advisory
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/11/msg00005.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201903-03Third Party Advisory
- https://usn.ubuntu.com/3805-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4331Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.