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CVE-2026-7168cross-proxy Digest auth state leak

Description

Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authentication and then changing the proxy host to a second one (`proxyB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Proxy-Authorization:` header field meant for `proxyA`, to `proxyB`.

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.

Show the exploits1

References tagged exploit1 reference

Timeline

  1. ID reserved

    By curl

  2. · 16 days later

    Published

  3. · 4 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-7168, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVDNVD · Modified3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (exploitation in 30 days)
0.47% · top 59% of all CVEs (13 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: Medium 5.3.

Affected products

  • curl · curl

    • affected 7.12.0 – < 8.14.2
    • affected 8.15.0 – < 8.16.1
    • affected 8.17.0 – < 8.20.0
  • curl · curl

    • affected fc6eff13b5414caf6edf22d73a3239e074a04216 – < c1cfdf59acbaf9504c4578d4cf56cdd7c8594507
  • curl · curl

    • 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
    • affected 8.12.1
    • affected 8.12.0
    • affected 8.11.1
    • affected 8.11.0
    • affected 8.10.1
    • affected 8.10.0
    • affected 8.9.1
    • affected 8.9.0
    • affected 8.8.0
    • affected 8.7.1
    • affected 8.7.0
    • affected 8.6.0
    • affected 8.5.0
    • affected 8.4.0
    • affected 8.3.0
    • affected 8.2.1
    • affected 8.2.0
    • affected 8.1.2
    • affected 8.1.1
    • affected 8.1.0
    • affected 8.0.1
    • affected 8.0.0
    • affected 7.88.1
    • affected 7.88.0
    • affected 7.87.0
    • affected 7.86.0
    • affected 7.85.0
    • affected 7.84.0
    • affected 7.83.1
    • affected 7.83.0
    • affected 7.82.0
    • affected 7.81.0
    • and 125 more

References

References4

Sources

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

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[![CVE-2026-7168](https://cveledger.app/badge/CVE-2026-7168.svg)](https://cveledger.app/cve/CVE-2026-7168)

Record last updated .