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Vulnerabilities

Vulnerability · CVE-2020-8927

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

Published Sep 15, 2020 · catalog updated Oct 26, 2026 · A buffer overflow exists

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-8927. EPSS is 3.22%. Act only if a listed version of A buffer overflow exists is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A buffer overflow exists).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.22%
Remediation
Advisory link
Affected products
Alpine:v3.12 brotli · Alpine:v3.13 brotli · Alpine:v3.14 brotli · Alpine:v3.15 brotli · Alpine:v3.16 brotli · Alpine:v3.17 brotli

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.12 brotli0 → 1.0.9-r0
  • Alpine:v3.13 brotli0 → 1.0.9-r0
  • Alpine:v3.14 brotli0 → 1.0.9-r0
  • Alpine:v3.15 brotli0 → 1.0.9-r0
  • Alpine:v3.16 brotli0 → 1.0.9-r0
  • Alpine:v3.17 brotli0 → 1.0.9-r0
  • Alpine:v3.18 brotli0 → 1.0.9-r0
  • Alpine:v3.19 brotli0 → 1.0.9-r0
  • Alpine:v3.20 brotli0 → 1.0.9-r0
  • Alpine:v3.21 brotli0 → 1.0.9-r0
  • Alpine:v3.22 brotli0 → 1.0.9-r0
  • Alpine:v3.23 brotli0 → 1.0.9-r0

How to fix CVE-2020-8927

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-8927. EPSS is 3.22%. Act only if a listed version of A buffer overflow exists is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.0.9-r0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 3.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 15, 2020 · Trivy Vulnerability DB

    Detected

    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 th

  2. Oct 26, 2026 · Trivy Vulnerability DB

    Fix available

    brotli fixed in 1.0.9-r0; brotli fixed in 1.0.9-r0; brotli fixed in 1.0.9-r0; brotli fixed in 1.0.9-r0

  3. Oct 26, 2026 · Trivy Vulnerability DB

    Fix available

    brotli fixed in 1.0.9-r0

  4. Oct 26, 2026 · Trivy Vulnerability DB

    Updated

    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 th

Sources

  • CVE.orgVulnerability recordCVE-2020-8927

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-8927

    30-day exploitation probability 3.22%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2020-8927
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2020-8927

    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 upda

    osv.dev

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • OpenSSF OSV / OSV ScannerOct 26, 2026
  • CVE.orgOct 26, 2026
  • Trivy Vulnerability DBOct 26, 2026