CVE-2026-47255: Input Validation Flaw (CVSS 8.2)

Description

AgenticMail gives AI agents real email addresses and phone numbers. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 had weakness related to validation and and binding of inactive-agent hour filtering; storage SQL identifier validation; metadata-backed ownership checks for raw storage SQL; blocking direct storage metadata access through raw SQL; fail-closed outbound worker secret handling; SMTP envelope/header control-character validation before command construction; and TLS certificate verification as the default for MailSender with an explicit opt-out for local development. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 are patched.

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CVSS v3.1 Score

8.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.08%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-20 Improper Input Validation

CWE-89 SQL Injection

CWE-284 CWE-284

CWE-319 CWE-319

CWE-798 CWE-798

References

Other References

https://github.com/agenticmail/agenticmail/blob/7b9b05d973676e9f3d097c08b8e649f59bfc15d0/CHANGELOG.md?plain=1#L1842 https://github.com/agenticmail/agenticmail/blob/7b9b05d973676e9f3d097c08b8e649f59bfc15d0/packages/core/src/mail/sender.ts#L33 https://github.com/agenticmail/agenticmail/commit/1408de543fa3577d8c2d4fdb289c75fe6faafac7 https://github.com/agenticmail/agenticmail/commit/234b811e426a0743170f3b10bc43419d64330155 https://github.com/agenticmail/agenticmail/commit/6c70c8254c906f823392d7f5ccee88a5481e7731 https://github.com/agenticmail/agenticmail/commit/8cb053f2307dd77b7736ffa0d7df04b0ccc3272d https://github.com/agenticmail/agenticmail/security/advisories/GHSA-wjjv-3mj2-39hf

Frequently Asked Questions

What is CVE-2026-47255? +

AgenticMail gives AI agents real email addresses and phone numbers. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 had weakness related to validation and and binding of inactive-agent hour filtering; storage SQL identifier validation; metadata-backed ownership checks for raw storage SQL; blocking direct storage metadata access through raw SQL; fail-closed outbound worker secret handling; SMTP envelope/header control-character validation before command construction; and TLS certificate verification as the default for MailSender with an explicit opt-out for local development. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 are patched. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-47255? +

CVE-2026-47255 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-47255? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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