How severe is CVE-2026-86738?

CVE-2026-86738 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-86738 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-86738?

CVE-2026-86738 affects Snipeitapp Snipe-it. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-86738?

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

When was CVE-2026-86738 published?

CVE-2026-86738 was published on 2026-09-08 and last updated on 2026-09-09.

CVE-2026-86738

CVE-2026-86738 is a high-severity vulnerability in Snipeitapp Snipe-it with a CVSS 3.x base score of 8.7. 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: High (CVSS 3.x base score 8.7)
CVSS v4: 9.3
EPSS exploit prediction: 0% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Snipeitapp Snipe-it
Published: 2026-09-08
Last modified: 2026-09-09

Description

Snipe-IT versions before 8.7.0 contain a CSS injection vulnerability in the Custom CSS field due to incomplete sanitization that reverses HTML encoding on greater-than and double-quote characters. Superusers can plant malicious CSS payloads using @import and url() references to exfiltrate CSRF tokens from other superusers via attribute-selector rules, enabling account takeover.

Frequently asked questions

What is CVE-2026-86738?: Snipe-IT versions before 8.7.0 contain a CSS injection vulnerability in the Custom CSS field due to incomplete sanitization that reverses HTML encoding on greater-than and double-quote characters. Superusers can plant malicious CSS payloads using @import and url() references to exfiltrate CSRF tokens from other superusers via attribute-selector rules, enabling account takeover.
How severe is CVE-2026-86738?: CVE-2026-86738 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-86738 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-86738?: CVE-2026-86738 affects Snipeitapp Snipe-it. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-86738?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-86738 published?: CVE-2026-86738 was published on 2026-09-08 and last updated on 2026-09-09.

References

Affected products (1)

cpe:2.3:a:snipeitapp:snipe-it:*:*:*:*:*:*:*:*

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