CVE-2026-27212: Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior

Q: How do I fix CVE-2026-27212?

swiper: upgrade to 12.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-27212 being exploited?

CVE-2026-27212 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27212 affect?

CVE-2026-27212 affects swiper. Severity is high (CVSS 7.8). Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior. Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the

Q: How urgent is CVE-2026-27212?

Priority 43/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2026-27212 is a high-severity flaw (CVSS 7.8) affecting swiper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior. Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the indexOf() function is used to check whether user provided input contain forbidden strings. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbid

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-1321
Published	2026-02-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: swiperjs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-21 06:17 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

swiperjs swiper UPGRADE

Affected: >= 6.5.1 and < 12.1.2

Fixed in: 12.1.2

Safe to downgrade to: a release before 6.5.1

1. Check installed version

npm ls swiper

2. UPGRADE to 12.1.2

npm install swiper@">=12.1.2"

3. If no update is available yet, DOWNGRADE to a release before 6.5.1

npm view swiper versions npm install swiper@"<6.5.1"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27212?

swiper: upgrade to 12.1.2. Exact commands for each OS are on this page.

Is CVE-2026-27212 being exploited?

CVE-2026-27212 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27212 affect?

CVE-2026-27212 affects swiper. Severity is high (CVSS 7.8). Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior. Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the

How urgent is CVE-2026-27212?

Priority 43/100. High severity; Public exploit reference

Related CVEs

CVE-2024-39853 MEDIUM 6.5 DOWNGRADE adolph_dudu ratio-swiper 0.0.2 was discovered to contain a prototype pollution via the function parse
CVE-2024-39000 MEDIUM 6.5 DOWNGRADE adolph_dudu ratio-swiper v0.0.2 was discovered to contain a prototype pollution via the function parse
CVE-2024-38997 MEDIUM 6.5 DOWNGRADE adolph_dudu ratio-swiper v0.0.2 was discovered to contain a prototype pollution via the function extendDefault

References

← Back to latest CVEs