What is CVE-2026-80443?

CVE-2026-80443 is Insecure TLS Certificate Validation in API Tool Runner in HAVELSAN's Sef - AI Chatbot Platform. The supplied enrichment data classifies it as Cryptography mapped to CWE-295 CWE-295.

Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-80443. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-80443 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

1 public PoC repositories reported; 0 marked weaponized in current dataset. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with web/proxy/WAF logs, application logs, network IDS/IPS where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-80443 using CVSS 7.4, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

The supplied mitigation guidance says to apply vendor patches and restrict external exposure until fixed. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

highCryptographypublic exploit

CVE-2026-80443

CVE-2026-80443 — Insecure TLS Certificate Validation in API Tool Runner in HAVELSAN's Sef - AI Chatbot Platform

Improper certificate validation vulnerability in HAVELSAN Inc. Sef - AI Chatbot Platform allows Adversary in the Middle (AiTM). This issue affects Sef - AI Chatbot Platform: before 2.1.

Published Oct 2, 2026Updated Oct 2, 2026Sources: NVD, HAVELSAN Inc. (CNA), GitHub, GitHub Security Advisory, SOCRadar CTI

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Exploit code

public exploit, none observed

EPSS

ahead of 0% of scored CVEs

Affects

HAVELSAN Inc.

Sef - AI Chatbot Platform

CVSS base

7.4

high

Remediation

The vendor's own words where we have them.

Upgrade Sef - AI Chatbot Platform to a fixed release. Apply vendor patches per advisory and restrict external exposure of the affected component until patched.

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Versions	Status
HAVELSAN Inc.	Sef - AI Chatbot Platform	0 to < 2.1	Vulnerable

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Availability

None

Confidentiality

High

Integrity

High

Scope

Unchanged

Attack Complexity

High

Attack Vector

Network

Privileges Req

None

User Interaction

None

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
7.4	CVSS 3.1	high	2.2	5.2	NVD, HAVELSAN Inc. (CNA), GHSA

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

What this weakness leads to

MITRE's own consequences and mitigations for the weakness class — the authority's wording, not guidance derived from the CVSS vector.

MITRE

CWE-295 · Improper Certificate Validation

Bypass Protection Mechanism
Gain Privileges or Assume Identity::

Mitigation: Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Weakness & attack patterns

CWE-295

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

CAPEC-475 · Signature Spoofing by Improper ValidationCAPEC-459 · Creating a Rogue Certification Authority Certificate

Public exploit

Capability, not use: code existing is a different claim from anyone running it.

Repositories

Detection

Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.

Prioritize edge telemetry for network-reachable Sef - AI Chatbot Platform.
Monitor for scanner or exploit-pattern traffic after 1 public PoC repositories were reported.

web/proxy/WAF logsapplication logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 7.4 (AV:N)
Oct 2, 2026 · NVD
Initial · CVE published
Oct 2, 2026 · NVD
Added · GHSA-679g-qgm4-wf24 published (high)
Oct 2, 2026 · GitHub Security Advisory
CVE published by NIST.
Oct 2, 2026 · SOCRadar CTI

References

3 on the record

siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1241
Vendor Advisory, NIST
nvd.nist.gov/vuln/detail/CVE-2026-80443
NVD
github.com/advisories/GHSA-679g-qgm4-wf24
Exploit, Third Party Advisory

Elsewhere on this site

HAVELSAN Inc.every CVE for this vendor
Cryptographysame class
CWE-295other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record1

What should defenders know first?

CVE-2026-80443 is Insecure TLS Certificate Validation in API Tool Runner in HAVELSAN's Sef - AI Chatbot Platform, a high vulnerability affecting Sef - AI Chatbot Platform from HAVELSAN Inc.. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-80443. Public exploit evidence is: 1 public PoC repositories reported; 0 marked weaponized in current dataset. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 7.4 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.