CVE-2020-8927
No exploitation reported by the sources we read.
- Published2020-09-15
- WeaknessCWE-120 · CWE-130
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
Timeline
dates in UTC- 2020-09-1510:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-28 15:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-8927?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-8927?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 31.x | = 31 | no fix published | NVD |
| 32.x | = 32 | no fix published | NVD |
| 33.x | = 33 | no fix published | NVD |
| 34.x | = 34 | no fix published | NVD |
| 35.x | = 35 | no fix published | NVD |
| 36.x | = 36 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.2 | ≥ 7.2, < 7.2.2 | 7.2.2 | NVD |
| 7.2 | ≥ 7.2.0, < 7.2.2 | 7.2.2 | OSV |
| 7.1 | ≥ 7.1, < 7.1.6 | 7.1.6 | NVD |
| 7.1 | ≥ 7.1.0, < 7.1.6 | 7.1.6 | OSV |
| 7.0 | ≥ 7.0, < 7.0.9 | 7.0.9 | NVD |
| 7.0 | ≥ 7.0.0, < 7.0.9 | 7.0.9 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 16.4 | = 16.04 | no fix published | NVD |
| 18.4 | = 18.04 | no fix published | NVD |
| 20.4 | = 20.04 | no fix published | NVD |
128 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- brotliAlmaLinux:8all versions · fixed in 1.0.6-3.el8and 2 other packages
- dotnet-hostfxr-3.1AlmaLinux:8all versions · fixed in 3.1.23-1.el8_5and 5 other packages
- dotnet-hostfxr-5.0AlmaLinux:8all versions · fixed in 5.0.15-1.el8_5and 5 other packages
- dotnet-sdk-3.1AlmaLinux:8all versions · fixed in 3.1.417-1.el8_5and 2 other packages
- dotnet-sdk-5.0AlmaLinux:8all versions · fixed in 5.0.212-1.el8_5and 2 other packages
Fix
Advisories and patches
- github.comRelease Notes
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- Published
- 2020-09-15
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-8927?
Is CVE-2020-8927 actively exploited?
What is the CVSS score for CVE-2020-8927?
Running brotli? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.