Red Hat Security Advisory: Satellite 6.18.3 Async Update
Affects Red Hat vdirsyncerSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 1.7 Low · fixed in Red Hat package updates : update Red Hat vdirsyncer when convenient.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.19.3_4, 1.16.43
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:UExploitation evidence
Disclosed: evidence found.
CVE published 14 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade vdirsyncer to 0.19.3_4; bzt to 1.16.43.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Homebrewvdirsyncerpkg:brew/vdirsyncerOther threats | Affected
| Fixed in
|
Homebrewbztpkg:brew/bztOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Security Fix(es): * python-aiohttp: AIOHTTP HTTP Request/Response Smuggling (CVE-2025-53643) * python3.12-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441) * python3.12-urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471)
References
- access.redhat.com/errata/RHSA-2026:2760 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2380000 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2419467 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2427726 (opens in a new tab)
- issues.redhat.com/browse/SAT-35237 (opens in a new tab)
- issues.redhat.com/browse/SAT-39454 (opens in a new tab)
- issues.redhat.com/browse/SAT-41521 (opens in a new tab)
- issues.redhat.com/browse/SAT-41522 (opens in a new tab)
- issues.redhat.com/browse/SAT-41523 (opens in a new tab)
- issues.redhat.com/browse/SAT-41524 (opens in a new tab)
- issues.redhat.com/browse/SAT-41525 (opens in a new tab)
- issues.redhat.com/browse/SAT-41526 (opens in a new tab)
- issues.redhat.com/browse/SAT-41527 (opens in a new tab)
- issues.redhat.com/browse/SAT-41528 (opens in a new tab)
- issues.redhat.com/browse/SAT-42125 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_2760.json (opens in a new tab)