CVE-2024-7246: It's possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2024-7246 is a medium-severity flaw (CVSS 5.3) affecting grpc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

It's possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy and the backend such that other clients see failed requests. It's also possible to use this vulnerability to leak other clients HTTP header keys, but not values. This occurs because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first requ

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-440
Published	2024-08-06
Last modified	2026-06-17

Publisher (CNA): Google Inc. · Vendor: grpc

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

Am I affected?

Timeline

2024-08-06 11:16 UTCPublished CVE record published
2026-06-17 08:19 UTCUpdated Record last modified

grpc grpc UPGRADE

Affected: < 1.58.3 · >= 1.59.0 and < 1.59.5 · >= 1.60.0 and < 1.60.2 · >= 1.61.0 and < 1.61.3 · >= 1.62.0 and < 1.62.3 · >= 1.63.0 and < 1.63.2 · >= 1.64.0 and < 1.64.3 · >= 1.65.0 and < 1.65.4

Fixed in: 1.58.3, 1.59.5, 1.60.2, 1.61.3, 1.62.3, 1.63.2, 1.64.3, 1.65.4

Safe to downgrade to: a release before 1.59.0

1. Check installed version

apt-cache policy grpc || rpm -q grpc || grpc --version

2. UPGRADE to 1.58.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade grpc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade grpc

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 1.59.0 (Debian / Ubuntu)

apt-cache madison grpc sudo apt install grpc=<VERSION_BEFORE_1.59.0> sudo apt-mark hold grpc

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

dnf --showduplicates list grpc sudo dnf downgrade grpc-<VERSION_BEFORE_1.59.0> sudo dnf versionlock add grpc

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-2024-7246?

grpc: upgrade to 1.58.3, 1.59.5, 1.60.2, 1.61.3, 1.62.3, 1.63.2, 1.64.3, 1.65.4. Exact commands for each OS are on this page.

Is CVE-2024-7246 being exploited?

CVE-2024-7246 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-2024-7246 affect?

CVE-2024-7246 affects grpc. Severity is medium (CVSS 5.3). It's possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy and the backend such that other clients see failed requests. It's also possible to use this vulnerability to leak other clients HT

How urgent is CVE-2024-7246?

Priority 32/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-33186 CRITICAL 9.1 UPGRADE gRPC-Go is the Go language implementation of gRPC
CVE-2024-11407 HIGH 7.5 UPGRADE There exists a denial of service through Data corruption in gRPC-C++ - gRPC-C++ servers with transmit zero cop

References

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