CVE-2020-8927

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

3.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 87.1% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-09-15 09:15Z5 YR AGO

Last updated

2026-05-29 20:52Z3 MO AGO

Reserved

2020-02-12

Assigning CNA

Google

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses

• CWE-130Improper Handling of Length Parameter InconsistencyBase
• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

6b4e4a92e7b35cc37556f5e07ec9e45caebf7c45079a25eca91f9fb6c849a4d6

• github.comhttps://github.com/google/brotli/releases/tag/v1.0.9x_refsource_CONFIRM
• lists.opensuse.orgopenSUSE-SU-2020:1578http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.htmlvendor-advisoryx_refsource_SUSE
• lists.fedoraproject.orgFEDORA-2020-22d278923ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MMBKACMLSRX7JJSKBTR35UOEP2WFR6QP/vendor-advisoryx_refsource_FEDORA
• usn.ubuntu.comUSN-4568-1https://usn.ubuntu.com/4568-1/vendor-advisoryx_refsource_UBUNTU
• lists.fedoraproject.orgFEDORA-2020-c663fbc46chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WW62OZEY2GHJL4JCOLJRBSRETXDHMWRK/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-e21bd401adhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4E265WKWKYMK2RYYSIXBEGZTDY5IQE6/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-bc9a739f0chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4VCDOJGL6BK3HB4XRD2WETBPYX2ITF6/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-9336b65f82https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W23CUADGMVMQQNFKHPHXVP7RPZJZNN6I/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-c76a35b209https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/356JOYTWW4BWSZ42SEFLV7NYHL3S3AEH/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20201201 [SECURITY] [DLA 2476-1] brotli security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00003.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-4801https://www.debian.org/security/2020/dsa-4801vendor-advisoryx_refsource_DEBIAN
• lists.fedoraproject.orgFEDORA-2022-9e046f579ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXEQ3GQVELA2T4HNZG7VPMS2HDVXMJRG/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-5ecee47acbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQLM7ABVCYJLF6JRPF3M3EBXW63GNC27/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-d28042f559https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TOGTZ2ZWDH662ZNFFSZVL3M5AJXV6JF/vendor-advisoryx_refsource_FEDORA