VulnerabilityModified
CVE-2020-8231
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
HIGH 7.5EPSS 5.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 5.34% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- haxx/libcurl · siemens/sinec infrastructure network services · debian/debian linux · oracle/communications cloud native core policy · splunk/universal forwarder
- Source
- support@hackerone.com
EPSS moved from 5.3% on 14 October 2026 to 5.3% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2020-8231.htmlPatch, Third Party Advisory
- https://hackerone.com/reports/948876Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3EMailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3EMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202012-14Third Party Advisory
- https://www.debian.org/security/2021/dsa-4881Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
- https://curl.haxx.se/docs/CVE-2020-8231.htmlPatch, Third Party Advisory
- https://hackerone.com/reports/948876Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3EMailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3EMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202012-14Third Party Advisory
- https://www.debian.org/security/2021/dsa-4881Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.