Red Hat Security Advisory: python-s3transfer security update
Affects Red Hat python-s3transferSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 20:36 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 5 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
AI-suggested
Red Hat has released an updated python-s3transfer package that fixes the vulnerability. Users of Red Hat Enterprise Linux 7 Extended Lifecycle Support should apply the update as described in the Red Hat advisory RHSA-2026:2060 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Description
A security update for python-s3transfer addresses a vulnerability in the urllib3 Streaming API that improperly handles highly compressed data (CVE-2025-66471). This issue affects Red Hat Enterprise Linux 7 Extended Lifecycle Support versions. The vulnerability is rated as having an Important security impact by Red Hat. The update fixes the flaw by correcting the handling of compressed data in urllib3.