Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-13608

CVE-2026-13608HIGH

curl curl — OpenLDAP SASL authentication bypass

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  H  H  N    7.4   .0048   39.2     —

AFFECTED
  Product  Versions                                    Fixed
  curl     7.82.0 –                                    —
  curl     eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4 –  —
  curl     8.21.0 –                                    —

TIMELINE
  Jun 29  Reserved by curl
  Sep 6   Published (CNA: curl)
  Sep 11  EXPLOIT PUBLISHED — CVE-2026-13608 (curl). Public exploit reference added.
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-13608 (curl). Public exploit reference added.

CWE-923 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Modified

Description

A flaw in the libcurl SASL negotiation for LDAP authentication allows an incomplete handshake sequence to be misinterpreted as a successful cryptographic verification. An attacker executing a Man-in-the-Middle (MITM) attack can inject a premature or shortcut response that bypasses complete peer validation.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
June 29, 2026	Reserved	Reserved by curl
September 6, 2026	Published	Published (CNA: curl)
September 11, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-13608 (curl). Public exploit reference added.
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-13608 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	7.82.0	—
curl	curl	—	eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4	—
curl	curl	—	8.21.0	—

Weaknesses

CWE-923

References (3)

https://curl.se/docs/CVE-2026-13608.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-13608.json [Vendor Advisory]
https://hackerone.com/reports/3822248 [Exploit, Third Party Advisory]

Authoritative record: CVE-2026-13608 at cve.org

Vendors: curl

Weaknesses: CWE-923

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-13608 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.