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CVE-2024-7246

HPACK table poisoning in gRPC C++, Python & Ruby

Medium6.3EPSS 0.22%
Published
Updated
Reserved
Assigned by
Google

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.

Scores

CVSS scores of CVE-2024-7246, by who scored it
Scored byCVSSScoreVector
GoogleCNA (assigner)4.0Medium6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
NVDNVD · Analyzed4.0Medium6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.22% · top 87% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.

Weakness

Affected products

  • Google · gRPC

    • affected 1.53.0
    • affected 1.53.1
    • affected 1.53.2
    • affected 1.54.0
    • affected 1.54.1
    • affected 1.54.3
    • affected 1.55.0
    • affected 1.55.1
    • affected 1.55.3
    • affected 1.55.4
    • affected 1.56.0
    • affected 1.56.1
    • affected 1.56.2
    • affected 1.56.3
    • affected 1.56.4
    • affected 1.57.0
    • affected 1.57.1
    • affected 1.58.0
    • affected 1.58.1
    • affected 1.58.2
    • affected 1.59.0
    • affected 1.59.1
    • affected 1.59.2
    • affected 1.59.3
    • affected 1.59.4
    • affected 1.60.0
    • affected 1.60.1
    • affected 1.61.0
    • affected 1.61.1
    • affected 1.62.0
    • affected 1.61.2
    • affected 1.62.1
    • affected 1.62.2
    • affected 1.63.0
    • affected 1.63.1
    • affected 1.64.0
    • affected 1.64.1
    • affected 1.64.2
    • affected 1.65.0
    • affected 1.65.1
    • and 2 more

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .