CVE-2024-7246HPACK table poisoning in gRPC C++, Python & Ruby
- 6.3MediumCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Google
- 8 days later
· 8 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GoogleCNA (assigner) | 4.0 | Medium6.3 | CVSS: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 · Analyzed | 4.0 | Medium6.3 | CVSS: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 (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.
Affected products
- 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
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-48194 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-7246)Record last updated .