Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Thunderbird | affected |
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No vendor fix or workaround currently provided.
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Tracking
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Tue, 20 Oct 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-125 | |
| Metrics |
cvssV3_1
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Tue, 20 Oct 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When authenticating to a POP3 or SMTP server using NTLM, Thunderbird did not check whether the server's challenge was valid base64. A malicious server could send a challenge that caused Thunderbird to include uninitialized heap memory in its NTLM response, disclosing that memory to the server. A challenge consisting only of base64 padding also caused an out-of-bounds read, crashing Thunderbird. This affected accounts configured to use NTLM or GSSAPI authentication. The uninitialized memory disclosure only affected NTLM. This vulnerability was fixed in Thunderbird 158.0.1. | When authenticating to a POP3 or SMTP server using NTLM, Thunderbird did not check whether the server's challenge was valid base64. A malicious server could send a challenge that caused Thunderbird to include uninitialized heap memory in its NTLM response, disclosing that memory to the server. A challenge consisting only of base64 padding also caused an out-of-bounds read, crashing Thunderbird. This affected accounts configured to use NTLM or GSSAPI authentication. The uninitialized memory disclosure only affected NTLM. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1. |
| References |
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Tue, 20 Oct 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When authenticating to a POP3 or SMTP server using NTLM, Thunderbird did not check whether the server's challenge was valid base64. A malicious server could send a challenge that caused Thunderbird to include uninitialized heap memory in its NTLM response, disclosing that memory to the server. A challenge consisting only of base64 padding also caused an out-of-bounds read, crashing Thunderbird. This affected accounts configured to use NTLM or GSSAPI authentication. The uninitialized memory disclosure only affected NTLM. This vulnerability was fixed in Thunderbird 158.0.1. | |
| Title | Uninitialized memory disclosure and out-of-bounds read in POP3 and SMTP NTLM authentication | |
| References |
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Subscriptions
No data.
MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-10-20T19:46:39.812Z
Reserved: 2026-10-20T19:14:55.281Z
Link: CVE-2026-113868
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-20T20:17:19.687
Modified: 2026-10-20T20:17:19.687
Link: CVE-2026-113868
Redhat
No data.
OpenCVE Enrichment
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CWE-125
Out-of-bounds Read