Affected versions: ≥ 10.0.0 and < 11.0.0
Full advisory: regularlabs.com
CVE-2026-88852HighCVSS 7.5Published 13 September 2026
Snippets (snippets) 10.0.0 to below 11.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 10.0.0 through 10.0.6 is affected by CVE-2026-88852, fixed in 11.0.0 (released 13 September 2026). Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. 11.0.0 restricts variable overrides to selected article author groups by default. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later. Note that 11.0.0 is flagged by the vendor as a BC BREAK: the restriction is enabled by default and has to be re-opened deliberately per author group, so any site relying on variable overrides should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 10.0.0 and < 11.0.0
Official record: cve.org · NVD
Every connected Joomla site is checked against these rules on each audit, and flagged if it runs an affected version.
How CVE-2026-88852 is scored
The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.
7.5 High
CVSS 4.0, scored by Joomla CNACVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:NHow it is reached
- AV:N Attack vector
- Network. Reachable across the internet
- AC:L Attack complexity
- Low. Nothing to work around, it just works
- AT:P Attack requirements
- Present. Needs a particular deployment or race to line up
- PR:H Privileges required
- High. Needs an account with elevated rights
- UI:N User interaction
- None. Nobody has to be tricked into anything
What it does to the site
- VC:H Confidentiality
- High. Everything the site holds can be read
- VI:H Integrity
- High. Data and files can be altered at will
- VA:L Availability
- Low. The site slows or stutters
What it does beyond the site
- SC:N Confidentiality
- None. Other systems keep their data
- SI:N Integrity
- None. Other systems keep their integrity
- SA:N Availability
- None. Other systems stay up
Affected extensions and versions
Snippets - Snippets (snippets) 1.0.0 to below 7.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 1.0.0 through 6.9.4 is affected by CVE-2026-88852. Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. The Free edition stopped being affected at 7.0.0; the Pro edition remained affected through 10.0.6 and was fixed in 11.0.0 (released 13 September 2026), which is covered by a separate rule. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later, the current release for both editions, and note that 11.0.0 is flagged by the vendor as a BC BREAK: variable overrides are restricted to selected article author groups by default and have to be re-opened deliberately, so any site relying on them should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 1.0.0 and < 7.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 10.0.0 to below 11.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 10.0.0 through 10.0.6 is affected by CVE-2026-88852, fixed in 11.0.0 (released 13 September 2026). Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. 11.0.0 restricts variable overrides to selected article author groups by default. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later. Note that 11.0.0 is flagged by the vendor as a BC BREAK: the restriction is enabled by default and has to be re-opened deliberately per author group, so any site relying on variable overrides should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 10.0.0 and < 11.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 10.0.0 to below 11.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 10.0.0 through 10.0.6 is affected by CVE-2026-88852, fixed in 11.0.0 (released 13 September 2026). Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. 11.0.0 restricts variable overrides to selected article author groups by default. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later. Note that 11.0.0 is flagged by the vendor as a BC BREAK: the restriction is enabled by default and has to be re-opened deliberately per author group, so any site relying on variable overrides should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 10.0.0 and < 11.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 10.0.0 to below 11.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 10.0.0 through 10.0.6 is affected by CVE-2026-88852, fixed in 11.0.0 (released 13 September 2026). Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. 11.0.0 restricts variable overrides to selected article author groups by default. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later. Note that 11.0.0 is flagged by the vendor as a BC BREAK: the restriction is enabled by default and has to be re-opened deliberately per author group, so any site relying on variable overrides should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 10.0.0 and < 11.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 1.0.0 to below 7.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 1.0.0 through 6.9.4 is affected by CVE-2026-88852. Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. The Free edition stopped being affected at 7.0.0; the Pro edition remained affected through 10.0.6 and was fixed in 11.0.0 (released 13 September 2026), which is covered by a separate rule. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later, the current release for both editions, and note that 11.0.0 is flagged by the vendor as a BC BREAK: variable overrides are restricted to selected article author groups by default and have to be re-opened deliberately, so any site relying on them should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 1.0.0 and < 7.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 1.0.0 to below 7.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 1.0.0 through 6.9.4 is affected by CVE-2026-88852. Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. The Free edition stopped being affected at 7.0.0; the Pro edition remained affected through 10.0.6 and was fixed in 11.0.0 (released 13 September 2026), which is covered by a separate rule. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later, the current release for both editions, and note that 11.0.0 is flagged by the vendor as a BC BREAK: variable overrides are restricted to selected article author groups by default and have to be re-opened deliberately, so any site relying on them should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 1.0.0 and < 7.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 1.0.0 to below 7.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 1.0.0 through 6.9.4 is affected by CVE-2026-88852. Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. The Free edition stopped being affected at 7.0.0; the Pro edition remained affected through 10.0.6 and was fixed in 11.0.0 (released 13 September 2026), which is covered by a separate rule. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later, the current release for both editions, and note that 11.0.0 is flagged by the vendor as a BC BREAK: variable overrides are restricted to selected article author groups by default and have to be re-opened deliberately, so any site relying on them should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 1.0.0 and < 7.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 10.0.0 to below 11.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 10.0.0 through 10.0.6 is affected by CVE-2026-88852, fixed in 11.0.0 (released 13 September 2026). Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. 11.0.0 restricts variable overrides to selected article author groups by default. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later. Note that 11.0.0 is flagged by the vendor as a BC BREAK: the restriction is enabled by default and has to be re-opened deliberately per author group, so any site relying on variable overrides should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 10.0.0 and < 11.0.0
Full advisory: regularlabs.com
Snippets - Snippets (snippets) 1.0.0 to below 7.0.0 - Authenticated Stored XSS via Snippet Variable Overrides
Regular Labs Snippets 1.0.0 through 6.9.4 is affected by CVE-2026-88852. Snippet variable overrides could be set by any user able to author content, letting a lower-privileged author change the values a snippet renders and inject script through them. The Free edition stopped being affected at 7.0.0; the Pro edition remained affected through 10.0.6 and was fixed in 11.0.0 (released 13 September 2026), which is covered by a separate rule. Exploitation requires the ability to author or edit content containing Snippets tags, so this is an authenticated stored XSS. Update to 11.0.0 or later, the current release for both editions, and note that 11.0.0 is flagged by the vendor as a BC BREAK: variable overrides are restricted to selected article author groups by default and have to be re-opened deliberately, so any site relying on them should review those settings after updating. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N.
Affected versions: ≥ 1.0.0 and < 7.0.0
Full advisory: regularlabs.com
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Rules current as of 3 October 2026.