GHSA-q6gh-6v2r-hjv3 Micronaut: DefaultHttpClient follows redirects, forwarding Authorization, Cookie, and Proxy-Authorization headers
Micronaut DefaultHttpClient leaks sensitive headers to cross-domain redirect targets and allows infinite redirect loops, risking credential exposure and DoS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-q6gh-6v2r-hjv3?
GHSA-q6gh-6v2r-hjv3 is a vulnerability in io.micronaut:micronaut-http-client, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Impact
> DefaultHttpClient follows redirects and forwards Authorization, Cookie, and Proxy-Authorization headers to redirect targets across domain boundaries. The blocklist only filters Host/Connection/TE/CT/CL. > Additionally, no maximum redirect count exists, enabling infinite loop DoS. > Affected: DefaultHttpClient.java lines 231-245, 1591, 2071
> Suggested fix: Strip sensitive headers on cross-domain redirects
Patches
It has been patched for versions:
For Micronaut 5, versions equal or greater than 5.0.1 >= For Micronaut 4, versions equal or greater than 4.10.24 >= For Micronaut 3, versions equal or greater than 3.10.6 >=
Workarounds
No
References
Micronaut 5 Patch: https://github.com/micronaut-projects/micronaut-core/commit/9770328999f490bdfbb9e25addd45bf73d4a173a Micronaut 4 Patch: https://github.com/micronaut-projects/micronaut-core/commit/70cab4b44fbf985faba2846091f2356b5bd70719 Micronaut 3 Patch: https://github.com/micronaut-projects/micronaut-core/commit/64e539736b8168f201d868b02ace50fe14f57418
Which versions are affected by GHSA-q6gh-6v2r-hjv3?
6 open source packages ship an affected version, including io.micronaut:micronaut-http-client.
| Package | Affected | Fixed in |
|---|---|---|
io.micronaut:micronaut-http-client Maven | From 1.2.8 | 3.10.6 |
io.micronaut:micronaut-http-client Maven | From 1.2.8 | 3.10.6 |
io.micronaut:micronaut-http-client Maven | From 4.0.0-M1 | 4.10.24 |
io.micronaut:micronaut-http-client Maven | From 4.0.0-M1 | 4.10.24 |
io.micronaut:micronaut-http-client Maven | From 5.0.0-M1 | 5.0.1 |
io.micronaut:micronaut-http-client Maven | From 5.0.0-M1 | 5.0.1 |
How do I fix GHSA-q6gh-6v2r-hjv3?
Upgrade io.micronaut:micronaut-http-client to a fixed version for your release line: 3.10.6, 4.10.24 or 5.0.1.
Is GHSA-q6gh-6v2r-hjv3 being exploited?
There is no known exploitation of GHSA-q6gh-6v2r-hjv3 in the wild and no public exploit code.