synced 1 MIN AGO
01 Record

CVE-2024-30255

HTTP/2: CPU exhaustion due to CONTINUATION frame flood

MediumPUBLISHEDCNA: GitHub_M
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
View raw JSON

02 Description

HTTP/2: CPU exhaustion due to CONTINUATION frame flood

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
87.81% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.7% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-04-04 19:41Z2 YR AGO
Last updated
2025-11-04 18:30Z11 MO AGO
Reserved
2024-03-26
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
  • CWE-390Detection of Error Condition Without ActionBase
Data version
5.2
Document digest
ef3bd2bfc848b25ed9770b6bf5fd95ce57e818c831869866ce9fc1a5cd82bc2d

05 Affected products

VendorProductVersionsPlatforms
envoyproxyenvoy>= 1.29.0, < 1.29.3, >= 1.28.0, < 1.28.2, >= 1.27.0, < 1.27.4, < 1.26.8, 1.29.0 to < 1.29.3, 1.28.0 to < 1.28.2, 1.27.0 to < 1.27.4, 0 to < 1.26.8—

06 References