CVE-2026-71190
highpriority · track · 0EPSS 0.008 · 58 %ileEUUSEPSS · scored 2026-10-27
In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS). The "qdtext" pattern (?:[^"]|\\.)* allows an unauthenticated remote attacker to send a crafted Accept header that causes exponential CPU consumption in the proxy worker. A payload of 32 backslash-character pairs exceeds 30 seconds of CPU time. No authentication is required. Repeated requests can exhaust all proxy worker threads, resulting in a complete denial of service.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://launchpad.net/bugs/2158771cnnvd
- https://openwall.com/lists/oss-security/2026/07/28/27cnnvd
- https://security.openstack.org/ossa/OSSA-2026-031.htmlcnnvd
- https://launchpad.net/bugs/2158771enisa_euvd
- https://openwall.com/lists/oss-security/2026/07/28/27enisa_euvd
- https://security.openstack.org/ossa/OSSA-2026-031.htmlenisa_euvd
- http://www.openwall.com/lists/oss-security/2026/08/05/19nvd
- https://launchpad.net/bugs/2158771nvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan