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CVE-2025-53643VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.0.7

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2025-53643· Low 1.7

Not known to be exploited · CVSS 1.7 Low : upgrade Red Hat aiohttp to 3.12.14 when convenient.

Data as of 3 Nov 2026, 17:45 UTC

CVSS 4.0 base score
1.7Low
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 3.12.14
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:U

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 3 Nov 2026.

What to do

Upgrade aiohttp to 3.12.14.

Affected software

ProductAffectedFixed in
PyPIaiohttppkg:pypi/aiohttpOther threatsAffected
  • <3.12.14
Fixed in
  • 3.12.14

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in Red Hat OpenShift Service Mesh version 3.0.7. Users should upgrade to this version to remediate the vulnerability. Refer to the official Red Hat OpenShift Service Mesh 3.0.7 documentation for upgrade instructions. No additional mitigation steps are indicated by the vendor advisory.

Description

Red Hat OpenShift Service Mesh 3.0.7 addresses a security vulnerability in the istio-proxyv2-rhel9 component, which is based on the open source Istio project. The vulnerability (CVE-2025-53643) involves HTTP Request/Response Smuggling due to incorrect parsing of chunked trailer sections in the AIOHTTP library. This issue has been fixed in the 3.0.7 release of Red Hat OpenShift Service Mesh.

References

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