CVE-2026-9641

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-06-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

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

Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations.

The default algorithm is HMAC-SHA1, which should only be used for legacy systems.

These versions default to using 1000 iterations.

Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.

CVSS v3
5.3
EG Score
5.3(high)
EPSS
13.2%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 14, 2026

Advisory Details (7)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

oss-security - Re: CVE-2026-9641: Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

http://www.openwall.com/lists/oss-security/2026/06/14/3
generic

oss-security - Re: CVE-2026-9641: Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

http://www.openwall.com/lists/oss-security/2026/06/14/2
generic

oss-security - Re: CVE-2026-9641: Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

http://www.openwall.com/lists/oss-security/2026/06/14/1
generic

oss-security - Re: CVE-2026-9641: Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

http://www.openwall.com/lists/oss-security/2026/06/13/1
generic

oss-security - CVE-2026-9641: Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

http://www.openwall.com/lists/oss-security/2026/06/12/5
generic

Client Challenge

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes
generic

Password Storage - OWASP Cheat Sheet Series

https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html#pbkdf2

Vendor Advisories for CVE-2026-9641(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 66× 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. 2026-07-07 01:08 UTCEG score recompute
  2. 2026-07-07 01:08 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 13:06 UTCEG score recompute
  6. 2026-07-05 13:06 UTCGHSA enrichment
  7. 2026-07-05 02:31 UTCEPSS rescore
  8. 2026-07-04 10:54 UTCEG score recompute
  9. 2026-07-04 10:54 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 02:38 UTCEG score recompute
  12. 2026-07-03 02:38 UTCGHSA enrichment
  13. 2026-07-02 00:35 UTCEG score recompute
  14. 2026-07-02 00:35 UTCGHSA enrichment
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-30 22:29 UTCEG score recompute
  18. 2026-06-30 22:29 UTCGHSA enrichment
  19. 2026-06-29 20:26 UTCEG score recompute
  20. 2026-06-29 20:26 UTCGHSA enrichment
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-28 18:24 UTCEG score recompute
  23. 2026-06-28 18:24 UTCGHSA enrichment
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 41 more
  1. 2026-06-27 16:21 UTCEG score recompute
  2. 2026-06-27 16:21 UTCGHSA enrichment
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-26 14:18 UTCEG score recompute
  5. 2026-06-26 14:18 UTCGHSA enrichment
  6. 2026-06-25 13:50 UTCEPSS rescore
  7. 2026-06-25 12:04 UTCEG score recompute
  8. 2026-06-25 12:04 UTCGHSA enrichment
  9. 2026-06-24 14:05 UTCEPSS rescore
  10. 2026-06-24 10:01 UTCEG score recompute
  11. 2026-06-24 10:01 UTCGHSA enrichment
  12. 2026-06-23 21:33 UTCEPSS rescore
  13. 2026-06-23 07:55 UTCEG score recompute
  14. 2026-06-23 07:55 UTCGHSA enrichment
  15. 2026-06-22 14:25 UTCEPSS rescore
  16. 2026-06-22 05:50 UTCEG score recompute
  17. 2026-06-22 05:49 UTCGHSA enrichment
  18. 2026-06-21 14:56 UTCEPSS rescore
  19. 2026-06-21 03:45 UTCEG score recompute
  20. 2026-06-21 03:45 UTCGHSA enrichment
  21. 2026-06-21 01:59 UTCEPSS rescore
  22. 2026-06-20 01:41 UTCEG score recompute
  23. 2026-06-20 01:40 UTCGHSA enrichment
  24. 2026-06-19 19:26 UTCEPSS rescore
  25. 2026-06-18 23:36 UTCEG score recompute
  26. 2026-06-18 23:36 UTCGHSA enrichment
  27. 2026-06-18 17:52 UTCEPSS rescore
  28. 2026-06-17 21:33 UTCEG score recompute
  29. 2026-06-17 21:33 UTCGHSA enrichment
  30. 2026-06-17 17:53 UTCEPSS rescore
  31. 2026-06-16 19:30 UTCEG score recompute
  32. 2026-06-16 19:30 UTCGHSA enrichment
  33. 2026-06-16 17:53 UTCEPSS rescore
  34. 2026-06-15 17:49 UTCEPSS rescore
  35. 2026-06-15 17:28 UTCEG score recompute▲ 5.30
  36. 2026-06-15 17:28 UTCGHSA enrichment
  37. 2026-06-14 23:18 UTCEPSS rescore
  38. 2026-06-13 23:00 UTCEPSS rescore
  39. 2026-06-12 20:13 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  40. 2026-06-12 18:14 UTCEG score recompute
  41. 2026-06-12 18:13 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-9641?
CVE-2026-9641 is a medium vulnerability published on June 12, 2026. Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations. The default algorithm is HMAC-SHA1, which should only be used for legacy systems. These versions default to using 1000 iterations. Depending on the chosen algorithm, 220,000 to 1,400,000…
When was CVE-2026-9641 disclosed?
CVE-2026-9641 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9641 actively exploited?
CVE-2026-9641 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9641?
CVE-2026-9641 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-9641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9641, 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

Explore the affected products and dependency analysis for CVE-2026-9641

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