How severe is CVE-2026-27812?

CVE-2026-27812 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-27812 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27812?

CVE-2026-27812 affects Sub2api. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27812?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27812 have an EU (EUVD) identifier?

Yes. CVE-2026-27812 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8782.

When was CVE-2026-27812 published?

CVE-2026-27812 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27812

CVE-2026-27812 is a critical-severity vulnerability in Sub2api with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-116.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 8.0
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8782
Weakness: CWE-116
Affected product: Sub2api
Published: 2026-02-26
Last modified: 2026-06-17

Description

Sub2API is an AI API gateway platform designed to distribute and manage API quotas from AI product subscriptions. A vulnerability in versions prior to 0.1.85 is a Password Reset Poisoning (Host Header / Forwarded Header trust issue), which allows attackers to manipulate the password reset link. Attackers can exploit this flaw to inject their own domain into the password reset link, leading to the potential for account takeover. The vulnerability has been fixed in version v0.1.85. If upgrading is not immediately possible, users can mitigate the vulnerability by disabling the "forgot password" feature until an upgrade to a patched version can be performed. This will prevent attackers from exploiting the vulnerability via the affected endpoint.

Frequently asked questions

What is CVE-2026-27812?: Sub2API is an AI API gateway platform designed to distribute and manage API quotas from AI product subscriptions. A vulnerability in versions prior to 0.1.85 is a Password Reset Poisoning (Host Header / Forwarded Header trust issue), which allows attackers to manipulate the password reset link. Attackers can exploit this flaw to inject their own domain into the password reset link, leading to the potential for account takeover. The vulnerability has been fixed in version v0.1.85. If upgrading is not immediately possible, users can mitigate the vulnerability by disabling the "forgot password" feature until an upgrade to a patched version can be performed. This will prevent attackers from exploiting the vulnerability via the affected endpoint.
How severe is CVE-2026-27812?: CVE-2026-27812 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-27812 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27812?: CVE-2026-27812 affects Sub2api. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27812?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27812 have an EU (EUVD) identifier?: Yes. CVE-2026-27812 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8782.
When was CVE-2026-27812 published?: CVE-2026-27812 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://github.com/Wei-Shaw/sub2api/security/advisories/GHSA-vc2q-289v-74g3

Affected products (1)

cpe:2.3:a:sub2api:sub2api:*:*:*:*:*:*:*:*

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