How severe is CVE-2026-26345?

CVE-2026-26345 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26345 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26345?

CVE-2026-26345 affects Spip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26345?

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

Does CVE-2026-26345 have an EU (EUVD) identifier?

Yes. CVE-2026-26345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7580.

When was CVE-2026-26345 published?

CVE-2026-26345 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2026-26345

CVE-2026-26345 is a medium-severity vulnerability in Spip with a CVSS 3.x base score of 5.4. 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 3.x base score 5.4)
CVSS v4: 8.6
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7580
Weakness: CWE-79
Affected product: Spip
Published: 2026-02-19
Last modified: 2026-06-17

Description

SPIP before 4.4.8 contains a stored cross-site scripting (XSS) vulnerability in the public area triggered in certain edge-case usage patterns. The echapper_html_suspect() function does not adequately sanitize user-controlled content, allowing authenticated users with content-editing privileges (e.g., author-level roles and above) to inject malicious scripts. The injected payload may be rendered across multiple pages within the framework and execute in the browser context of other users, including administrators. Successful exploitation can allow attackers to perform actions in the security context of the victim user, including unauthorized modification of application state. This vulnerability is not mitigated by the SPIP security screen.

Frequently asked questions

What is CVE-2026-26345?: SPIP before 4.4.8 contains a stored cross-site scripting (XSS) vulnerability in the public area triggered in certain edge-case usage patterns. The echapper_html_suspect() function does not adequately sanitize user-controlled content, allowing authenticated users with content-editing privileges (e.g., author-level roles and above) to inject malicious scripts. The injected payload may be rendered across multiple pages within the framework and execute in the browser context of other users, including administrators. Successful exploitation can allow attackers to perform actions in the security context of the victim user, including unauthorized modification of application state. This vulnerability is not mitigated by the SPIP security screen.
How severe is CVE-2026-26345?: CVE-2026-26345 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26345 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26345?: CVE-2026-26345 affects Spip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26345?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26345 have an EU (EUVD) identifier?: Yes. CVE-2026-26345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7580.
When was CVE-2026-26345 published?: CVE-2026-26345 was published on 2026-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:spip:spip:*:*:*:*:*:*:*:*

More vulnerabilities in Spip

CVE-2012-4331 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in SPIP before 1.9.2.o, 2.0.x before 2.0.18, and 2.1.x before 2.1.13 have unknown…
CVE-2008-5812 — Critical (CVSS 10.0): Multiple unspecified vulnerabilities in SPIP 1.8 before 1.8.3b, 1.9 before 1.9.2g, and 2.0 before 2.0.2 have unknown…
CVE-2024-8517 — Critical (CVSS 9.8): SPIP before 4.3.2, 4.2.16, and 4.1.18 is vulnerable to a command injection issue. A remote and unauthenticated…
CVE-2023-27372 — Critical (CVSS 9.8): SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled.…
CVE-2023-24258 — Critical (CVSS 9.8): SPIP v4.1.5 and earlier was discovered to contain a SQL injection vulnerability via the _oups parameter. This…
CVE-2020-28984 — Critical (CVSS 9.8): prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display,…

All CVEs affecting Spip →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →