High severity · published Aug 5, 2026
CVE-2026-48834
Apache Answer: Denial of service via crafted Accept-Language header parsing
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
Improper Handling of Length Parameter Inconsistency vulnerability in Apache Answer.
This issue affects Apache Answer: through 2.0.1.
Unauthenticated attackers can cause a denial of service via a specially crafted Accept-Language header that triggers excessive CPU consumption during parsing.
Users are recommended to upgrade to version 2.0.2, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Apache Answer · Apache Software Foundation
through 2.0.1 · source: vendor
AN
Answer · Apache
before 2.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48834
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48834
Mailing List
https://lists.apache.org/thread/0yg5smwnbrhqs55m5h61gn42mcs8s95p
Mailing List
http://www.openwall.com/lists/oss-security/2026/08/05/9
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