CVE-2026-13608

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.4Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.4
EG Score
7.4(high)
EG Risk
49(Track*)
EG Risk 49/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity74% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

HackerOne

https://hackerone.com/reports/3822248
generic

curl - OpenLDAP SASL authentication bypass - CVE-2026-13608

https://curl.se/docs/CVE-2026-13608.html
generic
https://curl.se/docs/CVE-2026-13608.json

Vendor Advisories for CVE-2026-13608(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(5 across 5 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
curl—8.22.0-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
curl—8.22.0-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
curl7.88.1-10 ... 8.9.1-2~bpo12+1 (179 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.22.0~rc3-1+exp1 (79 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.22.0~rc3-1+exp1 (73 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 39× in last 7d / 71× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 02:04 UTCEG score recompute
  2. 2026-09-19 02:04 UTCVendor advisory
  3. 2026-09-19 02:04 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 13:12 UTCVendor advisory
  6. 2026-09-18 13:12 UTCGHSA enrichment
  7. 2026-09-18 00:20 UTCEG score recompute
  8. 2026-09-18 00:20 UTCVendor advisory
  9. 2026-09-18 00:20 UTCGHSA enrichment
  10. 2026-09-17 11:28 UTCVendor advisory
  11. 2026-09-17 11:28 UTCGHSA enrichment
  12. 2026-09-16 22:36 UTCEG score recompute
  13. 2026-09-16 22:36 UTCVendor advisory
  14. 2026-09-16 22:36 UTCGHSA enrichment
  15. 2026-09-16 09:44 UTCEG score recompute
  16. 2026-09-16 09:44 UTCVendor advisory
  17. 2026-09-16 09:44 UTCGHSA enrichment
  18. 2026-09-16 05:14 UTCEPSS rescore
  19. 2026-09-15 20:51 UTCVendor advisory
  20. 2026-09-15 20:51 UTCGHSA enrichment
  21. 2026-09-15 07:28 UTCVendor advisory
  22. 2026-09-15 07:28 UTCGHSA enrichment
  23. 2026-09-15 06:39 UTCEG score recompute
  24. 2026-09-15 06:39 UTCVendor advisory
  25. 2026-09-15 06:39 UTCGHSA enrichment
Show 46 more
  1. 2026-09-15 01:31 UTCVendor advisory
  2. 2026-09-15 01:31 UTCGHSA enrichment
  3. 2026-09-14 12:39 UTCVendor advisory
  4. 2026-09-14 12:39 UTCGHSA enrichment
  5. 2026-09-13 23:44 UTCEG score recompute
  6. 2026-09-13 23:44 UTCVendor advisory
  7. 2026-09-13 23:44 UTCGHSA enrichment
  8. 2026-09-13 16:46 UTCEPSS rescore
  9. 2026-09-13 10:52 UTCVendor advisory
  10. 2026-09-13 10:52 UTCGHSA enrichment
  11. 2026-09-12 22:00 UTCEG score recompute
  12. 2026-09-12 22:00 UTCVendor advisory
  13. 2026-09-12 22:00 UTCGHSA enrichment
  14. 2026-09-12 15:00 UTCEPSS rescore
  15. 2026-09-12 09:08 UTCVendor advisory
  16. 2026-09-12 09:08 UTCGHSA enrichment
  17. 2026-09-11 20:16 UTCEG score recompute
  18. 2026-09-11 20:16 UTCVendor advisory
  19. 2026-09-11 20:16 UTCGHSA enrichment
  20. 2026-09-11 14:52 UTCEPSS rescore
  21. 2026-09-11 09:36 UTCEPSS rescore
  22. 2026-09-11 09:12 UTCGHSA enrichment
  23. 2026-09-10 20:20 UTCEG score recompute
  24. 2026-09-10 20:20 UTCGHSA enrichment
  25. 2026-09-10 09:34 UTCEPSS rescore
  26. 2026-09-10 07:28 UTCGHSA enrichment
  27. 2026-09-09 18:35 UTCVendor advisory
  28. 2026-09-09 18:35 UTCGHSA enrichment
  29. 2026-09-09 05:43 UTCEG score recompute
  30. 2026-09-09 05:43 UTCVendor advisory
  31. 2026-09-09 05:43 UTCGHSA enrichment
  32. 2026-09-08 22:00 UTCEPSS rescore
  33. 2026-09-08 16:50 UTCEG score recompute
  34. 2026-09-08 16:50 UTCVendor advisory
  35. 2026-09-08 16:50 UTCGHSA enrichment
  36. 2026-09-08 15:48 UTCEG score recompute▲ 7.40
  37. 2026-09-08 15:48 UTCVendor advisory
  38. 2026-09-08 15:47 UTCGHSA enrichment
  39. 2026-09-08 15:44 UTCMITRE cvelistV5CVSS v3 → 7.4 · severity → HIGH
  40. 2026-09-08 15:04 UTCEG score recompute
  41. 2026-09-08 15:04 UTCVendor advisory
  42. 2026-09-08 15:04 UTCGHSA enrichment
  43. 2026-09-07 16:01 UTCEPSS rescore
  44. 2026-09-06 18:20 UTCNVD update
  45. 2026-09-06 17:49 UTCEG score recompute
  46. 2026-09-06 17:48 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-13608?
CVE-2026-13608 is a high vulnerability published on September 6, 2026. 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…
When was CVE-2026-13608 disclosed?
CVE-2026-13608 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13608 actively exploited?
CVE-2026-13608 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.6% of all scored CVEs.
What is the CVSS score of CVE-2026-13608?
CVE-2026-13608 has a CVSS v3.1 base score of 7.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13608?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13608, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-13608

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