7.4

CVE-2026-13608: curl

CVSS: 7.4v3.1HighModified
AliasesALPINE-CVE-2026-13608UBUNTU-CVE-2026-13608DEBIAN-CVE-2026-13608
Published 06-09-2026Last modified 15-09-2026
Open JSON

Vulnerability summary

CVE-2026-13608 is a high (CVSS 7.4) vulnerability in curl. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · -0.17 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 13 · Related 10
MGASA-2026-0515OPENSUSE-SU-2026:11696-1OPENSUSE-SU-2026:21774-1RHSA-2026:63161RHSA-2026:63514SUSE-SU-2026:23498-1

Timeline

  1. 06-09-2026
    PublishedVulnerability first disclosed.
  2. 15-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

-0.17 pp

From 0.64% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (hackerone.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • curl< 8.22.0-r0
  • libcurl4All versions (No fix recorded)
Wolfi2 products
  • curl< 8.22.0-r0
  • libcurl4All versions (No fix recorded)
Alpine1 product
  • curl≥ 7.82.0, < 8.22.0-r0
Curl1 product
  • curl≥ 7.82.0, < 8.14.2 | ≥ 8.15.0, < 8.16.1 | ≥ 8.17.0, < 8.20.1 | ≥ 8.21.0, < 8.22.0 | ≥ eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4, < ea71c3b6b60e563651ea8596a975aef0c8199519 | 8.21.0 | 8.20.0 | 8.19.0 | 8.18.0 | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0 | 8.10.1 | 8.10.0 | 8.9.1 | 8.9.0 | 8.8.0 | 8.7.1 | 8.7.0 | 8.6.0 | 8.5.0 | 8.4.0 | 8.3.0 | 8.2.1 | 8.2.0 | 8.1.2 | 8.1.1 | 8.1.0 | 8.0.1 | 8.0.0 | 7.88.1 | 7.88.0 | 7.87.0 | 7.86.0 | 7.85.0 | 7.84.0 | 7.83.1 | 7.83.0 | 7.82.0
Debian1 product
  • curlAll versions (No fix recorded) | < 8.22.0~rc2-1
Haxx1 product
  • curl≥ 7.82.0, < 8.22.0
Ubuntu1 product
  • curl< 8.5.0-2ubuntu10.15 | < 8.20.0-2ubuntu11 | < 8.18.0-1ubuntu2.7

7 vendors · 9 products

References

11 links
Show all 11 references