Distribution advisory
This page covers CVE-2026-6478 as tracked by Alpine, for the package postgresql15. The fix is available in version 15.18-r0; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: None — an unauthenticated stranger can try it.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
- Integrity impact: Low — limited, and the attacker does not choose what is affected.
- Availability impact: None.
Weakness class
ALPINE-CVE-2026-6478 is classified as CWE-385: Covert Timing Channel. Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.
Affected software
ALPINE-CVE-2026-6478 is recorded against 4 packages.
- postgresql15 (fixed in 15.18-r0)
- postgresql16 (fixed in 16.14-r0)
- postgresql17 (fixed in 17.10-r0)
- postgresql18 (fixed in 18.4-r0)
Timeline and source
Published on 14 May 2026 and last revised on 15 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
security.alpinelinux.org (Advisory)
Other advisories for this package
postgresql15 has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-385: Covert Timing Channel) in other software:
