CVE-2026-107503
HIGHDescription
Unvalidated environments URL allows OAuth authorization code + PKCE verifier theft and account takeover via injected OIDC authority in Ditto Explorer in Eclipse Ditto Ditto Explorer [3.6.0,3.9.7] allows a craft link set an attacker-controlled OIDC authority with autoSso enabled. The UI then automatically starts a login at the genuine identity provider but exchanges the returned authorization code together with its PKCE code_verifier at an attacker-controlled token endpoint. This lets the attacker redeem the code for the victim's access and refresh tokens. Alternatively, an attacker-controlled api_uri causes the UI to send the victim's bearer token or Basic credentials to the attacker. Because the configuration is persisted, later visits to the UI without the crafted link repeat the token theft.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v4 Vector
Exploitability
Impact
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploit Intelligence
Low risk: more likely to be exploited than 6% of all known CVEs.
References
Related Vulnerabilities
Other CWE-15 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-39280 | Critical | 9.1 | 34% | - | - |
| CVE-2023-50252 | High | 8.3 | 24% | - | Fix |
| CVE-2024-38666 | Critical | 9.1 | 19% | - | - |
| CVE-2024-51544 | High | 8.2 | 13% | - | Fix |
| CVE-2024-10979 | High | 8.8 | 4.4% | - | Fix |
| CVE-2026-41176 | Critical | 9.8 | 3.2% | - | Fix |
Common questions
How do I fix CVE-2026-107503?
No published fix for CVE-2026-107503 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-107503 being actively exploited?
Not that we know of. CVE-2026-107503 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.18% is the estimated probability that it will be exploited in the next 30 days. That is higher than 6% of all scored CVEs.
How severe is CVE-2026-107503?
CVE-2026-107503 has a CVSS v4 base score of 7.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
Embed a live status badge for CVE-2026-107503
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-08.