02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: apacheApache Tomcat: HTTP/2 excess header handling DoS
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- 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
- 4.60% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 90.8% 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
- Important. 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.
SCHEMA: 5.2
- Published
- 2024-07-03 19:32Z2 YR AGO
- Last updated
- 2025-11-03 19:29Z10 MO AGO
- Reserved
- 2024-05-08
- Assigning CNA
- apache
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400Uncontrolled Resource ConsumptionClass
- CWE-755Improper Handling of Exceptional ConditionsClass
- CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
- Data version
- 5.2
- Document digest
- d08668aae58b1b3e7fbf15e67b8ac4fee6efbc3caa8a185e12776b7e8bbb1e53
05 Affected products
PAIRS: 2VendorProductVersionsPlatforms
Apache Software FoundationApache Tomcat11.0.0-M1 to 11.0.0-M20, 10.1.0-M1 to 10.1.24, 9.0.0-M1 to 9.0.89, 8.5.0 to 8.5.100— apachetomcat9.0.0-m1 to 9.0.89, 10.1.0-m1 to 10.1.24, 11.0.0-m1 to 11.0.0-m20—