PT-2026-67961
CVE-2026-71190
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Published
2026-08-05
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Updated
2026-08-06
Description by
CVSS 4.0
8.7
HighMetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Name of the Vulnerable Software and Affected Versions
OpenStack Swift versions prior to 2.38.1
Description
The proxy server Accept header parser uses a regular expression with a
qdtext pattern (?:[^"|.)* that is susceptible to catastrophic backtracking, a type of Regular Expression Denial of Service (ReDoS) where certain input strings cause the engine to take an exponential amount of time to process. An unauthenticated remote attacker can send a specially crafted Accept header, such as one containing 32 backslash-character pairs, to cause excessive CPU consumption in the proxy worker. Repeated requests of this nature can exhaust all available proxy worker threads, leading to a complete denial of service.Recommendations
Update OpenStack Swift to version 2.38.1 or later.
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