Skip to content
fr Sign in
8.7 High

CVE-2026-71190 In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to…

Description

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.

Affected products and versions

Product Affected versions Fixed in
Swift 2.38.0 No fix stated
Swift 2.37 2.37.0 → < 2.37.3 2.37.3
Swift 2.36 2.36.0 → < 2.36.3 2.36.3
Swift 1.9 1.9.1 → < 2.35.4 2.35.4

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Swift

The 6 CVEs of Swift →
CVE-2026-97149 In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the X-Copy-From header on PUT requests 5.3 Medium CVE-2026-71192 In OpenStack Swift through 2.38.0, the S3API middleware does not sanitize Swift-native control headers (X-Copy-From,… 6.0 Medium CVE-2026-71191 In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the… 6.0 Medium CVE-2026-50221 In OpenStack Swift before 2.37.2, proxy-server does not strip internal update headers (X-Container-Host,… 5.3 Medium
Track this CVE