OSV-2026-1189 Global-buffer-overflow in oidc_cfg_redirect_urls_allowed_get
A global buffer overflow in the OIDC library allows attackers to cause denial of service or potentially execute code via crafted redirect URLs.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2026-1189?
OSV-2026-1189 is a memory corruption vulnerability in mod-auth-openidc, published on 23 Aug 2026. It can be exploited over the network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=550474749
Crash type: Global-buffer-overflow READ 8
Crash state:
oidc_cfg_redirect_urls_allowed_get
oidc_validate_redirect_url
fuzz_url.c
Which versions are affected by OSV-2026-1189?
1 open source package ship an affected version, including mod-auth-openidc.
| Package | Affected | Fixed in |
|---|---|---|
mod-auth-openidc OSS-Fuzz | All versions | None |
How do I fix OSV-2026-1189?
No fix has been published for OSV-2026-1189 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2026-1189 being exploited?
There is no known exploitation of OSV-2026-1189 in the wild and no public exploit code.