CVE-2026-44437: The Angular SSR is a server-rise rendering tool for Angular applications

Q: How do I fix CVE-2026-44437?

angular cli: upgrade to 19.2.25, 20.3.25, 21.2.9. Exact commands for each OS are on this page.

Q: Is CVE-2026-44437 being exploited?

CVE-2026-44437 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-2026-44437 affect?

CVE-2026-44437 affects angular cli. Severity is medium (CVSS 6.1). The Angular SSR is a server-rise rendering tool for Angular applications. From 19.0.0-next.0 to before 19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7, a vulnerability exists in the X-Forwarded-Prefix header processing logic within Angular SSR.

Q: How urgent is CVE-2026-44437?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-44437 is a medium-severity flaw (CVSS 6.1) affecting angular cli. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Angular SSR is a server-rise rendering tool for Angular applications. From 19.0.0-next.0 to before 19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7, a vulnerability exists in the X-Forwarded-Prefix header processing logic within Angular SSR. The internal validation mechanism fails to properly account for URL-encoded characters, specifically dots (%2e%2e). This allows an attacker to bypass security filters by injecting encoded path traversal sequen

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-22, CWE-601
Published	2026-05-13
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 22:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

angular angular cli UPGRADE

Affected: >= 19.0.0 and < 19.2.25 · >= 20.0.0 and < 20.3.25 · >= 21.0.0 and < 21.2.9 · 22.0.0 next0 · 22.0.0 next1 · 22.0.0 next2 · 22.0.0 next3 · 22.0.0 next4

Fixed in: 19.2.25, 20.3.25, 21.2.9

Safe to downgrade to: a release before 19.0.0

1. Check installed version

npm ls angular-cli

2. UPGRADE to 19.2.25

npm install angular-cli@">=19.2.25"

3. If no update is available yet, DOWNGRADE to a release before 19.0.0

npm view angular-cli versions npm install angular-cli@"<19.0.0"

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-2026-44437?

angular cli: upgrade to 19.2.25, 20.3.25, 21.2.9. Exact commands for each OS are on this page.

Is CVE-2026-44437 being exploited?

CVE-2026-44437 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-2026-44437 affect?

CVE-2026-44437 affects angular cli. Severity is medium (CVSS 6.1). The Angular SSR is a server-rise rendering tool for Angular applications. From 19.0.0-next.0 to before 19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7, a vulnerability exists in the X-Forwarded-Prefix header processing logic within Angular SSR.

How urgent is CVE-2026-44437?

Priority 24/100. No elevated risk signals yet.

Software pages

Angular vulnerabilities

References

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