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CVE-2026-9080

UAF after pause in socket callback

High7.3EPSS 0.49%
Published
Updated
Reserved
Assigned by
curl

Description

Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

Scores

CVSS scores of CVE-2026-9080, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1High7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVDNVD · Modified3.1High7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS (exploitation in 30 days)
0.49% · top 57% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: poc · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.

Weakness

Affected products

  • curl · curl

    • affected 8.13.0 – < 8.14.2
    • affected 8.15.0 – < 8.16.1
    • affected 8.17.0 – < 8.20.1

  • curl · curl

    • affected cfc657a48dbafb4194676d4c9d841388b3a22210 – < 5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd

  • curl · curl

    • affected 8.20.0
    • affected 8.19.0
    • affected 8.18.0
    • affected 8.17.0
    • affected 8.16.0
    • affected 8.15.0
    • affected 8.14.1
    • affected 8.14.0
    • affected 8.13.0

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .