# CVE-2022-27779: CVE-2022-27779

Status: published. Published: 2022-06-01. Updated: 2026-11-02.

libcurl wrongly allows cookies to be set for Top Level Domains (TLDs) if thehost name is provided with a trailing dot.curl can be told to receive and send cookies. curl's "cookie engine" can bebuilt with or without [Public Suffix List](https://publicsuffix.org/)awareness. If PSL support not provided, a more rudimentary check exists to atleast prevent cookies from being set on TLDs. This check was broken if thehost name in the URL uses a trailing dot.This can allow arbitrary sites to set cookies that then would get sent to adifferent and unrelated site or domain.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- n/a / https://github.com/curl/curl: Fixed in 7.83.1 (affected). Source: CNA: hackerone
- Siemens / SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 2.79% as of 2026-11-02; percentile 86.40%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-201

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://hackerone.com/reports/1553301 (CNA: hackerone)

- https://security.netapp.com/advisory/ntap-20220609-0009/ (CNA: hackerone)

- https://security.gentoo.org/glsa/202212-01 (CNA: hackerone; vendor-advisory)

- https://hackerone.com/reports/1553301 (ADP: CVE; x_transferred)

- https://security.netapp.com/advisory/ntap-20220609-0009/ (ADP: CVE; x_transferred)

- https://security.gentoo.org/glsa/202212-01 (ADP: CVE; vendor-advisory, x_transferred)

- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (ADP: siemens-SADP)

## Provenance

- CNA: hackerone: https://www.cve.org/CVERecord?id=CVE-2022-27779; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-27779; retrieved 2026-11-02; source updated Not reported

Revision: b79694a6edb9f218d7daf2eb2e5b24886a0043f875bcede9fe1c02538f4e91e4

Canonical: https://y2.dev/cve/CVE-2022-27779

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