CVE-2026-78701: 389-ds-base Ubuntu Out-of-bounds Write
Vulnerability summary
CVE-2026-78701 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in 389-ds-base Ubuntu. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 25-08-2026PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
A flaw was found in 389-ds-base. A remote, authenticated attacker could exploit a vulnerability in the Simple Authentication and Security Layer (SASL) UNBIND process. By sending a specially crafted request, the attacker can cause a connection to stall, leading to resource exhaustion and a Denial of Service (DoS) for the server.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.78%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
+0.36 pp
From 0.42% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu1 product
- 389-ds-baseAll versions (No fix recorded)
1 vendor · 1 product