CVE-2026-71190In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS).
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OpenStack Swift openstack:swift (from the name) | from 1.9.1 before 2.35.4; from 2.36.0 before 2.36.3; from 2.37.0 before 2.37.3; 2.38.0 | CNA record |
References
- https://launchpad.net/bugs/2158771issue-tracking
- https://openwall.com/lists/oss-security/2026/07/28/27vendor-advisory, mailing-list
- https://security.openstack.org/ossa/OSSA-2026-031.htmlvendor-advisory
- http://www.openwall.com/lists/oss-security/2026/08/05/19
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.