OSV-2026-610 Memcpy-param-overlap in htx_replace_blk_value
A memory corruption vulnerability in the HTTP header replacement logic allows remote attackers to cause a denial of service via crafted requests.
- 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-2026-610?
OSV-2026-610 is a memory corruption vulnerability in haproxy, published on 22 Apr 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=504612570
Crash type: Memcpy-param-overlap
Crash state:
htx_replace_blk_value
http_replace_header_value
http_scheme_based_normalize
Which versions are affected by OSV-2026-610?
1 open source package ship an affected version, including haproxy.
| Package | Affected | Fixed in |
|---|---|---|
haproxy OSS-Fuzz | All versions | None |
How do I fix OSV-2026-610?
No fix has been published for OSV-2026-610 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-2026-610 being exploited?
There is no known exploitation of OSV-2026-610 in the wild and no public exploit code.