CVE-2026-77205

lowpriority · track · 0EPSS 0.002 · 8 %ile
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.18% (8th) EPSS
CVSS 3.7 · low
Is it mine?
0 products
Check your exposure
Who says so?
— sources

EPSS · scored 2026-10-25

Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.

01

cvss

Technical severity, 0–10. One row per scoring source.

3.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondaryexploitability 2.2 · impact 1.4
v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-772US
03

affected products

Products and version ranges known to be affected.

No affected products recorded.

04

sources

Which sources assert this record, and when.

NVDCVE.orgMITRE
published 2026-10-13modified 2026-10-16
05

references (3) nvd

External citations — patches, advisories, analysis.

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