8.7

CVE-2026-71190: openstack swift

CVSS: 8.7v4.0HighAwaiting analysis
AliasesUBUNTU-CVE-2026-71190DEBIAN-CVE-2026-71190
Published 05-08-2026Last modified 06-08-2026
Open JSON

Vulnerability summary

CVE-2026-71190 is a high (CVSS 8.7) vulnerability in openstack swift. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 56.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.84%
0%100%
Low · +0.30 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-08-2026
    PublishedVulnerability first disclosed.
  2. 06-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.84%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

+0.30 pp

From 0.54% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.84%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • swift< 2.30.1-0+deb12u2 | All versions (No fix recorded) | < 2.37.1-6
Openstack1 product
  • swift≥ 1.9.1, < 2.35.4 | ≥ 2.36.0, < 2.36.3 | ≥ 2.37.0, < 2.37.3 | 2.38.0
Ubuntu1 product
  • swiftAll versions (No fix recorded)

3 vendors · 3 products

References

8 links