TS
Product
Traffic Server
by Apache · last CVE Jul 29, 2026
120
CVEs
0
On KEV
10.0
Max CVSS
0
New 30D
Severity mix
Critical 21High 75Medium 20Low 0
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2021-37148
7.5
3%
Nov 3
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests
Affected: 8.0.0 through 8.1.2; 9.0.0 through 9.0.1
CVE-2021-37147
7.5
3%
Nov 3
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests
Affected: 8.0.0 through 8.1.2; 9.0.0 through 9.1.0
CVE-2021-32567
7.5
2%
Jun 30
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server
Affected: 7.0.0 through 7.1.12; 8.0.0 through 8.1.1; 9.0.0 through 9.0.1
CVE-2021-32566
7.5
2%
Jun 30
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server
Affected: 7.0.0 through 7.1.12; 8.0.0 through 8.1.1; 9.0.0 through 9.0.1
CVE-2021-32565
7.5
2%
Jun 29
Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests
Affected: 7.0.0 through 7.1.12; 8.0.0 through 8.1.1; 9.0.0 through 9.0.1
CVE-2021-27577
7.5
3%
Jun 29
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache
Affected: 7.0.0 through 7.1.12; 8.0.0 through 8.1.1; 9.0.0 through 9.0.1
CVE-2021-27737
7.5
4%
May 14
Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin
Affected: 9.0.0
CVE-2020-17509
7.5
2%
Jan 11
ATS negative cache option is vulnerable to a cache poisoning attack
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.10; 8.0.0 through 8.0.7
CVE-2020-17508
7.5
2%
Jan 11
The ATS ESI plugin has a memory disclosure vulnerability
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.11; 8.0.0 through 8.1.0
CVE-2020-9494
7.5
4%
Jun 24
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…
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.10; 8.0.0 through 8.0.7
CVE-2020-9481
7.5
2%
Apr 27
Apache ATS 6.0.0 to 6.2.3, 7.0.0 to 7.1.9, and 8.0.0 to 8.0.6 is vulnerable to a HTTP/2 slow read attack
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.9; 8.0.0 through 8.0.6
CVE-2019-10079
7.5
5%
Oct 22
Apache Traffic Server is vulnerable to HTTP/2 setting flood attacks
Affected: before 7.1.7; 8.0.0 before 8.0.4
CVE-2019-9518
7.5
25%
Aug 13
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9517
7.5
28%
Aug 13
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9515
7.5
87%
Aug 13
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9514
7.5
83%
Aug 13
Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9513
7.5
82%
Aug 13
Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9512
7.5
83%
Aug 13
Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2019-9511
7.5
60%
Aug 13
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
Affected: 6.0.0 through 6.2.3; 7.0.0 through 7.1.6; 8.0.0 through 8.0.3
CVE-2018-11783
7.5
2%
Mar 7
sslheaders plugin extracts information from the client certificate and sets headers in the request based on the configuration of the plugin
Affected: 6.0.0 through 6.0.3; 7.0.0 through 7.1.5; 8.0.0 through 8.0.1
CVE-2018-8022
7.5
7%
Aug 29
A carefully crafted invalid TLS handshake can cause Apache Traffic Server (ATS) to segfault
Affected: 6.0.0 through 6.2.2
CVE-2018-1318
7.5
8%
Aug 29
Adding method ACLs in remap.config can cause a segfault when the user makes a carefully crafted request
Affected: 6.0.0 through 6.2.2; 7.0.0 through 7.1.3
CVE-2017-7671
7.5
2%
Feb 27
There is a DOS attack vulnerability in Apache Traffic Server (ATS) 5.2.0 to 5.3.2, 6.0.0 to 6.2.0, and 7.0.0 with the TLS handshake
Affected: 5.2.0 through 5.3.2; after 6.0.0 through 6.2.0; 7.0.0
CVE-2017-5659
7.5
3%
Apr 17
Apache Traffic Server before 6.2.1 generates a coredump when there is a mismatch between content length and chunked encoding
Affected: through 6.2.0
CVE-2016-5396
7.5
3%
Apr 17
Apache Traffic Server 6.0.0 to 6.2.0 are affected by an HPACK Bomb Attack
Affected: 6.0.0; 6.1.0; 6.1.1; 6.2.0
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