Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread
Published Jun 24, 2020
7.5
HIGHCVSS 3.1
EPSS 3.58%
Description
Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread.
Affected products
-
- Version 6.0.0 to 6.2.3StatusaffectedConstraints-
- Version 7.0.0 to 7.1.10StatusaffectedConstraints-
- Version 8.0.0 to 8.0.7StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Traffic Server | n/a |
|
Configuration 1
- ≥ 6.0.0 · ≤ 6.2.3
- ≥ 7.0.0 · ≤ 7.1.10
- ≥ 8.0.0 · ≤ 8.0.7
Configuration 2
- 10.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 3.58% (0.03580) | 89.05th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.91% (0.03909) | 88.90th | v5 (v2026.06.15) |
| Jun 10, 2026 | 1.98% (0.01980) | 83.94th | v4 (v2025.03.14) |
| Mar 2, 2026 | 3.18% (0.03178) | 86.78th | v4 (v2025.03.14) |
| Nov 21, 2025 | 1.17% (0.01169) | 78.03th | v4 (v2025.03.14) |
| Nov 18, 2025 | 13.33% (0.13332) | 93.53th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.08% (0.01077) | 75.81th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.38% (0.03385) | 78.79th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.15% (0.01147) | 77.00th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.57% (0.00566) | 78.53th | v3 (v2023.03.01) |
| Apr 28, 2024 | 0.57% (0.00566) | 77.51th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00411) | 73.24th | v3 (v2023.03.01) |
| Jul 12, 2023 | 0.41% (0.00411) | 70.44th | v3 (v2023.03.01) |
| May 17, 2023 | 0.29% (0.00290) | 64.38th | v3 (v2023.03.01) |
| Mar 10, 2023 | 0.41% (0.00411) | 69.87th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.37% (0.00370) | 68.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.74% (0.05736) | 77.22th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.18% (0.10179) | 87.37th | v1 |
| Jan 6, 2022 | 10.18% (0.10179) | 87.22th | v1 |
| Sep 1, 2021 | 2.46% (0.02463) | 78.49th | v1 |
| Apr 14, 2021 | 2.46% (0.02463) | 0.00th | v1 |
References (3)
- http://www.openwall.com/lists/oss-security/2021/03/01/2 mailing-listx_refsource_MLISTNot Applicable
- https://lists.apache.org/thread.html/rf7f86917f42fdaf904d99560cba0c016e03baea6244c47efeb60ecbe%40%3Cdev.trafficserver.apache.org%3E x_refsource_CONFIRMMailing ListVendor Advisory
- https://www.debian.org/security/2020/dsa-4710 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2021/03/01/2 | mailing-listx_refsource_MLISTNot Applicable | |
| https://lists.apache.org/thread.html/rf7f86917f42fdaf904d99560cba0c016e03baea6244c47efeb60ecbe%40%3Cdev.trafficserver.apache.org%3E | x_refsource_CONFIRMMailing ListVendor Advisory | |
| https://www.debian.org/security/2020/dsa-4710 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.