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VulnerabilityPublished Updated

CVE-2026-41715: Spring Reactor Netty · Insufficiently Protected Credentials

Affects Spring Reactor NettySource CVE Database V5

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Not known to be exploited · CVSS 6.1 Medium · fixed in 1.3.15.1 : update Spring Reactor Netty when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.3.15.1, 1.2.17.1, 1.1.36 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 2026

  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 30 Oct 2026.

What to do

Upgrade Spring Reactor Netty to 1.3.15.1, 1.2.17.1, 1.1.36 or 1.0.52.

Affected software

ProductAffectedFixed in
SpringReactor NettyAffected
  • >=1.3.0 <1.3.15.1
Fixed in
  • 1.3.15.1
SpringReactor NettyAffected
  • >=1.2.0 <1.2.17.1
Fixed in
  • 1.2.17.1
SpringReactor NettyAffected
  • >=1.1.0 <1.1.36
Fixed in
  • 1.1.36
SpringReactor NettyAffected
  • >=1.0.0 <1.0.52
Fixed in
  • 1.0.52
Mavenio.projectreactor/reactor-nettypkg:maven/io.projectreactor/reactor-nettyOther threatsAffected
  • 1.0.0 – 1.3.5
8 affected builds
Fixed in–

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

AI-suggested

If you cannot patch yet, avoid configuring the Reactor Netty HTTP client to follow redirects from secure to insecure endpoints. Review application configurations to prevent automatic redirect following in these scenarios.

Description

CVE-2026-41715 is a medium severity vulnerability in Spring Reactor Netty HTTP client where credentials may be leaked during HTTP redirects from secure to insecure endpoints if the client is configured to follow redirects. This affects versions 1.0.0 through 1.0.51, 1.1.0 through 1.1.35, 1.2.0 through 1.2.17, and 1.3.0 through 1.3.5.

References

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