CVE-2021-47748: Hasura GraphQL 1.3.3 contains a remote code execution vulnerability that allows attackers to execute arbitrary

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-47748 is a critical-severity flaw (CVSS 9.8) affecting graphql engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Hasura GraphQL 1.3.3 contains a remote code execution vulnerability that allows attackers to execute arbitrary shell commands through SQL query manipulation. Attackers can inject commands into the run_sql endpoint by crafting malicious GraphQL queries that execute system commands through PostgreSQL's COPY FROM PROGRAM functionality.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-01-21
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: hasura

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

Am I affected?

Timeline

2026-01-21 18:16 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

hasura graphql engine DOWNGRADE

Affected: 1.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.3

1. Check installed version

apt-cache policy graphql-engine || rpm -q graphql-engine || graphql-engine --version

2. No fixed release: DOWNGRADE to a release before 1.3.3 (Debian / Ubuntu)

apt-cache madison graphql-engine sudo apt install graphql-engine=<VERSION_BEFORE_1.3.3> sudo apt-mark hold graphql-engine

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list graphql-engine sudo dnf downgrade graphql-engine-<VERSION_BEFORE_1.3.3> sudo dnf versionlock add graphql-engine

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · proftpd · FIXED · 1.3.9e-2.fc46 · FEDORA-2026-fcb0a25c2f · source

sudo dnf upgrade --advisory=FEDORA-2026-fcb0a25c2f

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/49802

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-2021-47748?

graphql engine: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-47748 being exploited?

CVE-2021-47748 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-2021-47748 affect?

CVE-2021-47748 affects graphql engine. Severity is critical (CVSS 9.8). Hasura GraphQL 1.3.3 contains a remote code execution vulnerability that allows attackers to execute arbitrary shell commands through SQL query manipulation. Attackers can inject commands into the run_sql endpoint by crafting malicious Grap

How urgent is CVE-2021-47748?

Priority 64/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

PostgreSQL vulnerabilities

Related CVEs

CVE-2026-54698 MEDIUM 5.9 UPGRADE Hasura is an open-source product that provides users GraphQL or REST APIs
CVE-2023-27588 HIGH 7.5 UPGRADE Hasura is an open-source product that provides users GraphQL or REST APIs
CVE-2022-46792 HIGH 8.8 UPGRADE Hasura GraphQL Engine before 2.15.2 mishandles row-level authorization in the Update Many API for Postgres bac
CVE-2021-47715 MEDIUM 5.3 DOWNGRADE Hasura GraphQL 1.3.3 contains a server-side request forgery vulnerability that allows attackers to inject arbi
CVE-2021-47714 MEDIUM 5.5 DOWNGRADE Hasura GraphQL 1.3.3 contains a local file read vulnerability that allows attackers to access system files thr

References

← Back to latest CVEs