6.3

CVE-2024-7246: HPACK table poisoning in gRPC C++, Python & Ruby

Analyzed
AliasesUBUNTU-CVE-2024-7246DEBIAN-CVE-2024-7246
Published 06-08-2024Last modified 06-08-2024

Vulnerability summary

CVE-2024-7246 is a medium (CVSS 6.3) Expected Behavior Violation vulnerability in google grpc. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.9% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 6.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 10 · Related 9
OPENSUSE-SU-2025:15031-1RHSA-2024:6428RHSA-2024:8906RHSA-2025:1335SUSE-SU-2024:4393-1SUSE-SU-2024:4400-1

Timeline

  1. 06-08-2024
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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 request being poisoned until cleared from the HPACK table. Please update to a fixed version of gRPC as soon as possible. This bug has been 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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Grpc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • grpcAll versions (No fix recorded)
Google1 product
  • grpc1.53.0 | 1.53.1 | 1.53.2 | 1.54.0 | 1.54.1 | 1.54.3 | 1.55.0 | 1.55.1 | 1.55.3 | 1.55.4 | 1.56.0 | 1.56.1 | 1.56.2 | 1.56.3 | 1.56.4 | 1.57.0 | 1.57.1 | 1.58.0 | 1.58.1 | 1.58.2 | 1.59.0 | 1.59.1 | 1.59.2 | 1.59.3 | 1.59.4 | 1.60.0 | 1.60.1 | 1.61.0 | 1.61.1 | 1.62.0 | 1.61.2 | 1.62.1 | 1.62.2 | 1.63.0 | 1.63.1 | 1.64.0 | 1.64.1 | 1.64.2 | 1.65.0 | 1.65.1 | 1.65.2 | 1.65.3
Grpc1 product
  • grpc< 1.58.3 | ≥ 1.59.0, < 1.59.5 | ≥ 1.60.0, < 1.60.2 | ≥ 1.61.0, < 1.61.3 | ≥ 1.62.0, < 1.62.3 | ≥ 1.63.0, < 1.63.2 | ≥ 1.64.0, < 1.64.3 | ≥ 1.65.0, < 1.65.4
Ubuntu1 product
  • grpcAll versions (No fix recorded)

4 vendors · 4 products

References

5 links