CVE-2026-48961

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

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

IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID.

When decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine &main::unpackValueQ' and the script exits with status 255.

Library callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-48961: IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID

http://www.openwall.com/lists/oss-security/2026/05/27/3
generic

Changes - metacpan.org

https://metacpan.org/release/PMQS/IO-Compress-2.220/changes
generic
https://github.com/pmqs/IO-Compress/commit/33c89d03d6e746ed2ead4f2f6570d47864c61bc7.patch

Vendor Advisories for CVE-2026-48961(1)

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

Affected Packages

(6 across 4 ecosystems)
Debian:13(2)
PackageVulnerable rangeFixed inDependents
libio-compress-perl2.213-1 ... 2.223-1 (9 versions)——
perl5.40.1-6 ... 5.44.0-1 (10 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
libio-compress-perl2.213-1, 2.214-1, 2.217-1, 2.219-1, 2.219-22.220-1—
perl5.40.1-6, 5.40.1-75.40.1-8—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
perl5.32.1-4 ... 5.44.0-1 (59 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
perl5.36.0-10 ... 5.44.0-1 (42 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 62× 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.

Showing the most recent 100 of 217 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-23 15:52 UTCEG score recompute
  12. 2026-08-23 15:52 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 21:13 UTCEG score recompute
  16. 2026-08-21 21:13 UTCGHSA enrichment
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-20 17:55 UTCEG score recompute
  19. 2026-08-20 17:55 UTCGHSA enrichment
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-17 09:28 UTCGHSA enrichment
  24. 2026-08-16 16:28 UTCEG score recompute
  25. 2026-08-16 16:28 UTCGHSA enrichment
Show 75 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 03:00 UTCEG score recompute
  3. 2026-08-16 03:00 UTCGHSA enrichment
  4. 2026-08-16 02:14 UTCEPSS rescore
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-15 00:02 UTCGHSA enrichment
  7. 2026-08-14 12:51 UTCGHSA enrichment
  8. 2026-08-14 01:39 UTCEG score recompute
  9. 2026-08-14 01:39 UTCGHSA enrichment
  10. 2026-08-13 22:00 UTCEPSS rescore
  11. 2026-08-13 10:41 UTCGHSA enrichment
  12. 2026-08-12 23:14 UTCEG score recompute
  13. 2026-08-12 23:14 UTCGHSA enrichment
  14. 2026-08-12 13:51 UTCEPSS rescore
  15. 2026-08-12 12:02 UTCGHSA enrichment
  16. 2026-08-12 00:50 UTCEG score recompute
  17. 2026-08-12 00:50 UTCGHSA enrichment
  18. 2026-08-11 13:38 UTCGHSA enrichment
  19. 2026-08-11 00:18 UTCEG score recompute
  20. 2026-08-11 00:18 UTCGHSA enrichment
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 08:25 UTCGHSA enrichment
  23. 2026-08-09 21:13 UTCEG score recompute
  24. 2026-08-09 21:13 UTCGHSA enrichment
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 10:01 UTCGHSA enrichment
  27. 2026-08-08 22:49 UTCEG score recompute
  28. 2026-08-08 22:49 UTCGHSA enrichment
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-08 05:06 UTCGHSA enrichment
  31. 2026-08-07 17:55 UTCEG score recompute
  32. 2026-08-07 17:55 UTCGHSA enrichment
  33. 2026-08-07 06:43 UTCGHSA enrichment
  34. 2026-08-06 19:29 UTCEG score recompute
  35. 2026-08-06 19:29 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-06 08:17 UTCGHSA enrichment
  38. 2026-08-05 20:59 UTCEG score recompute
  39. 2026-08-05 20:59 UTCGHSA enrichment
  40. 2026-08-05 19:17 UTCEPSS rescore
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:39 UTCEPSS rescore
  43. 2026-08-04 03:49 UTCGHSA enrichment
  44. 2026-08-03 16:35 UTCEG score recompute
  45. 2026-08-03 16:35 UTCGHSA enrichment
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-03 01:43 UTCGHSA enrichment
  48. 2026-08-02 14:31 UTCGHSA enrichment
  49. 2026-08-02 03:19 UTCGHSA enrichment
  50. 2026-08-01 16:07 UTCEG score recompute
  51. 2026-08-01 16:07 UTCGHSA enrichment
  52. 2026-08-01 04:16 UTCEPSS rescore
  53. 2026-07-31 08:18 UTCEG score recompute
  54. 2026-07-31 08:18 UTCGHSA enrichment
  55. 2026-07-30 16:28 UTCEPSS rescore
  56. 2026-07-30 01:30 UTCEPSS rescore
  57. 2026-07-29 16:21 UTCEG score recompute
  58. 2026-07-29 16:21 UTCGHSA enrichment
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-26 14:54 UTCEPSS rescore
  61. 2026-07-26 07:39 UTCEG score recompute
  62. 2026-07-26 07:39 UTCGHSA enrichment
  63. 2026-07-25 14:18 UTCEPSS rescore
  64. 2026-07-24 14:18 UTCEPSS rescore
  65. 2026-07-23 14:18 UTCEPSS rescore
  66. 2026-07-23 03:18 UTCEG score recompute
  67. 2026-07-22 14:08 UTCEPSS rescore
  68. 2026-07-20 17:08 UTCEPSS rescore
  69. 2026-07-19 14:31 UTCEPSS rescore
  70. 2026-07-19 14:31 UTCEPSS rescore
  71. 2026-07-19 05:22 UTCOSV refresh
  72. 2026-07-19 02:29 UTCEPSS rescore
  73. 2026-07-18 10:04 UTCEPSS rescore
  74. 2026-07-16 17:03 UTCEPSS rescore
  75. 2026-07-15 16:57 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48961?
CVE-2026-48961 is a high vulnerability published on May 27, 2026. IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID. When decodeux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8,…
When was CVE-2026-48961 disclosed?
CVE-2026-48961 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48961 actively exploited?
CVE-2026-48961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.3% of all scored CVEs.
What is the CVSS score of CVE-2026-48961?
CVE-2026-48961 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-48961?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48961, 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-2026-48961

Explore →

Is Your Infrastructure Affected by CVE-2026-48961?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs