How severe is CVE-2026-44651?

CVE-2026-44651 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2026-44651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44651?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44651 have an EU (EUVD) identifier?

Yes. CVE-2026-44651 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33405.

When was CVE-2026-44651 published?

CVE-2026-44651 was published on 2026-05-29 and last updated on 2026-06-17.

CVE-2026-44651

CVE-2026-44651 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-79.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33405
Weakness: CWE-79
Published: 2026-05-29
Last modified: 2026-06-17

Description

SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, when fetch(url) throws, the code sends: res.status(500).send('Error occurred while trying to proxy to: ' + url + ' ' + error). The url value is attacker-controlled (req.params.url) and is not HTML-escaped before rendering. This vulnerability is fixed in 1.18.0.

Frequently asked questions

What is CVE-2026-44651?: SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, when fetch(url) throws, the code sends: res.status(500).send('Error occurred while trying to proxy to: ' + url + ' ' + error). The url value is attacker-controlled (req.params.url) and is not HTML-escaped before rendering. This vulnerability is fixed in 1.18.0.
How severe is CVE-2026-44651?: CVE-2026-44651 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2026-44651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-44651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44651 have an EU (EUVD) identifier?: Yes. CVE-2026-44651 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33405.
When was CVE-2026-44651 published?: CVE-2026-44651 was published on 2026-05-29 and last updated on 2026-06-17.

References

https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-xc4x-2452-5gc9

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