CVE-2019-20809: The price oracle in PriceOracle.sol in Compound Finance Compound Price Oracle 1.0 through 2.0 allows a price p

This month

HIGH 7.5REMOTEUPGRADE

CVE-2019-20809 is a high-severity flaw (CVSS 7.5) affecting price oracle. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The price oracle in PriceOracle.sol in Compound Finance Compound Price Oracle 1.0 through 2.0 allows a price poster to set an invalid asset price via the setPrice function, and consequently violate the intended limits on price swings.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Published	2020-06-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: compound

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-06-03 17:15 UTCPublished CVE record published
2026-06-17 02:31 UTCUpdated Record last modified

compound price oracle UPGRADE

Affected: >= 1.0 and <= 2.0

Fixed in: newer than 2.0

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy price-oracle || rpm -q price-oracle || price-oracle --version

2. UPGRADE to newer than 2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade price-oracle

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade price-oracle

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison price-oracle sudo apt install price-oracle=<VERSION_BEFORE_1.0> sudo apt-mark hold price-oracle

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list price-oracle sudo dnf downgrade price-oracle-<VERSION_BEFORE_1.0> sudo dnf versionlock add price-oracle

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-20809?

price oracle: upgrade to newer than 2.0. Exact commands for each OS are on this page.

Is CVE-2019-20809 being exploited?

CVE-2019-20809 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-20809 affect?

CVE-2019-20809 affects price oracle. Severity is high (CVSS 7.5). The price oracle in PriceOracle.sol in Compound Finance Compound Price Oracle 1.0 through 2.0 allows a price poster to set an invalid asset price via the setPrice function, and consequently violate the intended limits on price swings.

How urgent is CVE-2019-20809?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs